diff --git a/webrtc/base/asyncsocket.h b/webrtc/base/asyncsocket.h
index 5dbffb966c..bf6c88aa39 100644
--- a/webrtc/base/asyncsocket.h
+++ b/webrtc/base/asyncsocket.h
@@ -11,7 +11,6 @@
 #ifndef WEBRTC_BASE_ASYNCSOCKET_H_
 #define WEBRTC_BASE_ASYNCSOCKET_H_
 
-#include "webrtc/base/common.h"
 #include "webrtc/base/sigslot.h"
 #include "webrtc/base/socket.h"
 
diff --git a/webrtc/base/diskcache.cc b/webrtc/base/diskcache.cc
index 4b3ec5feff..2747018d17 100644
--- a/webrtc/base/diskcache.cc
+++ b/webrtc/base/diskcache.cc
@@ -26,11 +26,7 @@
 #include "webrtc/base/stringencode.h"
 #include "webrtc/base/stringutils.h"
 
-#if !defined(NDEBUG)
-#define TRANSPARENT_CACHE_NAMES 1
-#else
-#define TRANSPARENT_CACHE_NAMES 0
-#endif
+#define TRANSPARENT_CACHE_NAMES RTC_DCHECK_IS_ON
 
 namespace rtc {
 
@@ -214,7 +210,7 @@ bool DiskCache::DeleteResource(const std::string& id) {
 }
 
 bool DiskCache::CheckLimit() {
-#if !defined(NDEBUG)
+#if RTC_DCHECK_IS_ON
   // Temporary check to make sure everything is working correctly.
   size_t cache_size = 0;
   for (EntryMap::iterator it = map_.begin(); it != map_.end(); ++it) {
diff --git a/webrtc/base/httpclient.cc b/webrtc/base/httpclient.cc
index c30b82f3ba..e65eb9e80c 100644
--- a/webrtc/base/httpclient.cc
+++ b/webrtc/base/httpclient.cc
@@ -13,6 +13,7 @@
 #include <memory>
 #include "webrtc/base/asyncsocket.h"
 #include "webrtc/base/checks.h"
+#include "webrtc/base/common.h"
 #include "webrtc/base/diskcache.h"
 #include "webrtc/base/httpclient.h"
 #include "webrtc/base/httpcommon-inl.h"
diff --git a/webrtc/base/httpcommon.cc b/webrtc/base/httpcommon.cc
index 389bca2aa1..3d46ab2770 100644
--- a/webrtc/base/httpcommon.cc
+++ b/webrtc/base/httpcommon.cc
@@ -679,37 +679,6 @@ HttpResponseData::parseLeader(const char* line, size_t len) {
 // Http Authentication
 //////////////////////////////////////////////////////////////////////
 
-#define TEST_DIGEST 0
-#if TEST_DIGEST
-/*
-const char * const DIGEST_CHALLENGE =
-  "Digest realm=\"testrealm@host.com\","
-  " qop=\"auth,auth-int\","
-  " nonce=\"dcd98b7102dd2f0e8b11d0f600bfb0c093\","
-  " opaque=\"5ccc069c403ebaf9f0171e9517f40e41\"";
-const char * const DIGEST_METHOD = "GET";
-const char * const DIGEST_URI =
-  "/dir/index.html";;
-const char * const DIGEST_CNONCE =
-  "0a4f113b";
-const char * const DIGEST_RESPONSE =
-  "6629fae49393a05397450978507c4ef1";
-//user_ = "Mufasa";
-//pass_ = "Circle Of Life";
-*/
-const char * const DIGEST_CHALLENGE =
-  "Digest realm=\"Squid proxy-caching web server\","
-  " nonce=\"Nny4QuC5PwiSDixJ\","
-  " qop=\"auth\","
-  " stale=false";
-const char * const DIGEST_URI =
-  "/";
-const char * const DIGEST_CNONCE =
-  "6501d58e9a21cee1e7b5fec894ded024";
-const char * const DIGEST_RESPONSE =
-  "edffcb0829e755838b073a4a42de06bc";
-#endif
-
 std::string quote(const std::string& str) {
   std::string result;
   result.push_back('"');
@@ -748,11 +717,6 @@ HttpAuthResult HttpAuthenticate(
   const std::string& username, const CryptString& password,
   HttpAuthContext *& context, std::string& response, std::string& auth_method)
 {
-#if TEST_DIGEST
-  challenge = DIGEST_CHALLENGE;
-  len = strlen(challenge);
-#endif
-
   HttpAttributeList args;
   HttpParseAttributes(challenge, len, args);
   HttpHasNthAttribute(args, 0, &auth_method, NULL);
@@ -796,15 +760,9 @@ HttpAuthResult HttpAuthenticate(
     context = new HttpAuthContext(auth_method);
 
     std::string cnonce, ncount;
-#if TEST_DIGEST
-    method = DIGEST_METHOD;
-    uri    = DIGEST_URI;
-    cnonce = DIGEST_CNONCE;
-#else
     char buffer[256];
     sprintf(buffer, "%d", static_cast<int>(time(0)));
     cnonce = MD5(buffer);
-#endif
     ncount = "00000001";
 
     std::string realm, nonce, qop, opaque;
@@ -837,10 +795,6 @@ HttpAuthResult HttpAuthenticate(
     std::string HA2 = MD5(A2);
     std::string dig_response = MD5(HA1 + ":" + middle + ":" + HA2);
 
-#if TEST_DIGEST
-    RTC_DCHECK(strcmp(dig_response.c_str(), DIGEST_RESPONSE) == 0);
-#endif
-
     std::stringstream ss;
     ss << auth_method;
     ss << " username=" << quote(username);
diff --git a/webrtc/base/httpserver.cc b/webrtc/base/httpserver.cc
index e5fb69ccbb..6594581aec 100644
--- a/webrtc/base/httpserver.cc
+++ b/webrtc/base/httpserver.cc
@@ -14,6 +14,7 @@
 
 #include "webrtc/base/asyncsocket.h"
 #include "webrtc/base/checks.h"
+#include "webrtc/base/common.h"
 #include "webrtc/base/httpserver.h"
 #include "webrtc/base/logging.h"
 #include "webrtc/base/socketstream.h"
diff --git a/webrtc/base/network_unittest.cc b/webrtc/base/network_unittest.cc
index 2c05b059cc..27dab48195 100644
--- a/webrtc/base/network_unittest.cc
+++ b/webrtc/base/network_unittest.cc
@@ -104,7 +104,7 @@ class NetworkTest : public testing::Test, public sigslot::has_slots<>  {
   AdapterType GetAdapterType(BasicNetworkManager& network_manager) {
     BasicNetworkManager::NetworkList list;
     network_manager.GetNetworks(&list);
-    RTC_CHECK(list.size() == 1u);
+    RTC_CHECK_EQ(1, list.size());
     return list[0]->type();
   }
 
diff --git a/webrtc/base/openssladapter.cc b/webrtc/base/openssladapter.cc
index 5556ce233e..d368186186 100644
--- a/webrtc/base/openssladapter.cc
+++ b/webrtc/base/openssladapter.cc
@@ -27,6 +27,7 @@
 
 #include "webrtc/base/arraysize.h"
 #include "webrtc/base/checks.h"
+#include "webrtc/base/common.h"
 #include "webrtc/base/logging.h"
 #include "webrtc/base/openssl.h"
 #include "webrtc/base/safe_conversions.h"
diff --git a/webrtc/base/opensslstreamadapter.cc b/webrtc/base/opensslstreamadapter.cc
index 0057ce1bf5..6ff7fd584b 100644
--- a/webrtc/base/opensslstreamadapter.cc
+++ b/webrtc/base/opensslstreamadapter.cc
@@ -25,6 +25,7 @@
 #include <vector>
 
 #include "webrtc/base/checks.h"
+#include "webrtc/base/common.h"
 #include "webrtc/base/logging.h"
 #include "webrtc/base/safe_conversions.h"
 #include "webrtc/base/stream.h"
diff --git a/webrtc/base/physicalsocketserver.cc b/webrtc/base/physicalsocketserver.cc
index 3b395ce63c..6970388844 100644
--- a/webrtc/base/physicalsocketserver.cc
+++ b/webrtc/base/physicalsocketserver.cc
@@ -138,7 +138,9 @@ PhysicalSocket::PhysicalSocket(PhysicalSocketServer* ss, SOCKET s)
 
     int type = SOCK_STREAM;
     socklen_t len = sizeof(type);
-    VERIFY(0 == getsockopt(s_, SOL_SOCKET, SO_TYPE, (SockOptArg)&type, &len));
+    const int res =
+        getsockopt(s_, SOL_SOCKET, SO_TYPE, (SockOptArg)&type, &len);
+    RTC_DCHECK_EQ(0, res);
     udp_ = (SOCK_DGRAM == type);
   }
 }
@@ -834,9 +836,9 @@ class EventDispatcher : public Dispatcher {
     CritScope cs(&crit_);
     if (!fSignaled_) {
       const uint8_t b[1] = {0};
-      if (VERIFY(1 == write(afd_[1], b, sizeof(b)))) {
-        fSignaled_ = true;
-      }
+      const ssize_t res = write(afd_[1], b, sizeof(b));
+      RTC_DCHECK_EQ(1, res);
+      fSignaled_ = true;
     }
   }
 
@@ -849,7 +851,8 @@ class EventDispatcher : public Dispatcher {
     CritScope cs(&crit_);
     if (fSignaled_) {
       uint8_t b[4];  // Allow for reading more than 1 byte, but expect 1.
-      VERIFY(1 == read(afd_[0], b, sizeof(b)));
+      const ssize_t res = read(afd_[0], b, sizeof(b));
+      RTC_DCHECK_EQ(1, res);
       fSignaled_ = false;
     }
   }
diff --git a/webrtc/base/proxydetect.cc b/webrtc/base/proxydetect.cc
index 83596b5669..b0fa30488a 100644
--- a/webrtc/base/proxydetect.cc
+++ b/webrtc/base/proxydetect.cc
@@ -34,6 +34,7 @@
 
 #include "webrtc/base/arraysize.h"
 #include "webrtc/base/checks.h"
+#include "webrtc/base/common.h"
 #include "webrtc/base/fileutils.h"
 #include "webrtc/base/httpcommon.h"
 #include "webrtc/base/httpcommon-inl.h"
diff --git a/webrtc/base/signalthread.h b/webrtc/base/signalthread.h
index befb02fb5b..a91e4ad34a 100644
--- a/webrtc/base/signalthread.h
+++ b/webrtc/base/signalthread.h
@@ -125,7 +125,7 @@ class SignalThread
       t_->cs_.Enter();
       // If refcount_ is zero then the object has already been deleted and we
       // will be double-deleting it in ~EnterExit()! (shouldn't happen)
-      RTC_DCHECK(t_->refcount_ != 0);
+      RTC_DCHECK_NE(0, t_->refcount_);
       ++t_->refcount_;
     }
     ~EnterExit() UNLOCK_FUNCTION() {
diff --git a/webrtc/base/socketadapters.cc b/webrtc/base/socketadapters.cc
index 0a94982613..f6029ce964 100644
--- a/webrtc/base/socketadapters.cc
+++ b/webrtc/base/socketadapters.cc
@@ -185,8 +185,8 @@ int AsyncSSLSocket::Connect(const SocketAddress& addr) {
 void AsyncSSLSocket::OnConnectEvent(AsyncSocket * socket) {
   RTC_DCHECK(socket == socket_);
   // TODO: we could buffer output too...
-  VERIFY(sizeof(kSslClientHello) ==
-      DirectSend(kSslClientHello, sizeof(kSslClientHello)));
+  const int res = DirectSend(kSslClientHello, sizeof(kSslClientHello));
+  RTC_DCHECK_EQ(sizeof(kSslClientHello), res);
 }
 
 void AsyncSSLSocket::ProcessInput(char* data, size_t* len) {
diff --git a/webrtc/base/sslstreamadapter_unittest.cc b/webrtc/base/sslstreamadapter_unittest.cc
index 82036913e0..737118aa2b 100644
--- a/webrtc/base/sslstreamadapter_unittest.cc
+++ b/webrtc/base/sslstreamadapter_unittest.cc
@@ -377,7 +377,9 @@ class SSLStreamAdapterTestBase : public testing::Test,
       // Make sure we simulate a reliable network for TLS.
       // This is just a check to make sure that people don't write wrong
       // tests.
-      RTC_CHECK((mtu_ == 1460) && (loss_ == 0) && (lose_first_packet_ == 0));
+      RTC_CHECK_EQ(1460, mtu_);
+      RTC_CHECK(!loss_);
+      RTC_CHECK(!lose_first_packet_);
     }
 
     if (!identities_set_)
@@ -414,7 +416,9 @@ class SSLStreamAdapterTestBase : public testing::Test,
       // Make sure we simulate a reliable network for TLS.
       // This is just a check to make sure that people don't write wrong
       // tests.
-      RTC_CHECK((mtu_ == 1460) && (loss_ == 0) && (lose_first_packet_ == 0));
+      RTC_CHECK_EQ(1460, mtu_);
+      RTC_CHECK(!loss_);
+      RTC_CHECK(!lose_first_packet_);
     }
 
     // Start the handshake
diff --git a/webrtc/base/win32window.cc b/webrtc/base/win32window.cc
index daa7688554..9abbc86807 100644
--- a/webrtc/base/win32window.cc
+++ b/webrtc/base/win32window.cc
@@ -9,7 +9,6 @@
  */
 
 #include "webrtc/base/checks.h"
-#include "webrtc/base/common.h"
 #include "webrtc/base/logging.h"
 #include "webrtc/base/win32window.h"
 
@@ -65,7 +64,8 @@ bool Win32Window::Create(HWND parent, const wchar_t* title, DWORD style,
 }
 
 void Win32Window::Destroy() {
-  VERIFY(::DestroyWindow(wnd_) != FALSE);
+  const bool success = ::DestroyWindow(wnd_);
+  RTC_DCHECK(success);
 }
 
 void Win32Window::Shutdown() {
diff --git a/webrtc/examples/peerconnection/client/peer_connection_client.cc b/webrtc/examples/peerconnection/client/peer_connection_client.cc
index 5cdce087c1..ab9cd328ba 100644
--- a/webrtc/examples/peerconnection/client/peer_connection_client.cc
+++ b/webrtc/examples/peerconnection/client/peer_connection_client.cc
@@ -238,7 +238,6 @@ void PeerConnectionClient::OnConnect(rtc::AsyncSocket* socket) {
   RTC_DCHECK(!onconnect_data_.empty());
   size_t sent = socket->Send(onconnect_data_.c_str(), onconnect_data_.length());
   RTC_DCHECK(sent == onconnect_data_.length());
-  RTC_UNUSED(sent);
   onconnect_data_.clear();
 }
 
@@ -249,7 +248,6 @@ void PeerConnectionClient::OnHangingGetConnect(rtc::AsyncSocket* socket) {
   int len = static_cast<int>(strlen(buffer));
   int sent = socket->Send(buffer, len);
   RTC_DCHECK(sent == len);
-  RTC_UNUSED2(sent, len);
 }
 
 void PeerConnectionClient::OnMessageFromPeer(int peer_id,
diff --git a/webrtc/media/base/fakemediaengine.h b/webrtc/media/base/fakemediaengine.h
index 11909659ea..2b774b2bb9 100644
--- a/webrtc/media/base/fakemediaengine.h
+++ b/webrtc/media/base/fakemediaengine.h
@@ -469,7 +469,7 @@ class FakeVoiceMediaChannel : public RtpHelper<VoiceMediaChannel> {
     auto it = local_sinks_.find(ssrc);
     if (source) {
       if (it != local_sinks_.end()) {
-        RTC_DCHECK(it->second->source() == source);
+        RTC_CHECK(it->second->source() == source);
       } else {
         local_sinks_.insert(
             std::make_pair(ssrc, new VoiceChannelAudioSink(source)));
diff --git a/webrtc/media/engine/fakewebrtcvoiceengine.h b/webrtc/media/engine/fakewebrtcvoiceengine.h
index 5f61cf1143..3b992f1e2c 100644
--- a/webrtc/media/engine/fakewebrtcvoiceengine.h
+++ b/webrtc/media/engine/fakewebrtcvoiceengine.h
@@ -332,7 +332,7 @@ class FakeWebRtcVoiceEngine
   }
   bool GetNetEqFastAccelerate() const {
     auto ch = channels_.find(last_channel_);
-    RTC_DCHECK(ch != channels_.end());
+    RTC_CHECK(ch != channels_.end());
     return ch->second->neteq_fast_accelerate;
   }
 
diff --git a/webrtc/media/engine/webrtcvoe.h b/webrtc/media/engine/webrtcvoe.h
index 41a5b5fe6a..6884aa4ea3 100644
--- a/webrtc/media/engine/webrtcvoe.h
+++ b/webrtc/media/engine/webrtcvoe.h
@@ -13,7 +13,6 @@
 
 #include <memory>
 
-#include "webrtc/base/common.h"
 #include "webrtc/media/engine/webrtccommon.h"
 
 #include "webrtc/common_types.h"
@@ -30,12 +29,18 @@ namespace cricket {
 class scoped_voe_engine {
  public:
   explicit scoped_voe_engine(webrtc::VoiceEngine* e) : ptr(e) {}
-  // VERIFY, to ensure that there are no leaks at shutdown
-  ~scoped_voe_engine() { if (ptr) VERIFY(webrtc::VoiceEngine::Delete(ptr)); }
+  // RTC_DCHECK, to ensure that there are no leaks at shutdown
+  ~scoped_voe_engine() {
+    if (ptr) {
+      const bool success = webrtc::VoiceEngine::Delete(ptr);
+      RTC_DCHECK(success);
+    }
+  }
   // Releases the current pointer.
   void reset() {
     if (ptr) {
-      VERIFY(webrtc::VoiceEngine::Delete(ptr));
+      const bool success = webrtc::VoiceEngine::Delete(ptr);
+      RTC_DCHECK(success);
       ptr = NULL;
     }
   }
diff --git a/webrtc/p2p/base/candidate.h b/webrtc/p2p/base/candidate.h
index 992f492617..5073aeb322 100644
--- a/webrtc/p2p/base/candidate.h
+++ b/webrtc/p2p/base/candidate.h
@@ -149,7 +149,7 @@ class Candidate {
   // cost of 0 indicates this candidate can be used freely. A value of
   // rtc::kNetworkCostMax indicates it should be used only as the last resort.
   void set_network_cost(uint16_t network_cost) {
-    RTC_DCHECK(network_cost <= rtc::kNetworkCostMax);
+    RTC_DCHECK_LE(network_cost, rtc::kNetworkCostMax);
     network_cost_ = network_cost;
   }
   uint16_t network_cost() const { return network_cost_; }
diff --git a/webrtc/p2p/base/dtlstransportchannel.cc b/webrtc/p2p/base/dtlstransportchannel.cc
index 575ec327b9..0359954a11 100644
--- a/webrtc/p2p/base/dtlstransportchannel.cc
+++ b/webrtc/p2p/base/dtlstransportchannel.cc
@@ -354,7 +354,8 @@ bool DtlsTransport::SetSrtpCryptoSuites(const std::vector<int>& ciphers) {
     return true;
   }
 
-  if (!VERIFY(dtls_state() == DTLS_TRANSPORT_NEW)) {
+  if (dtls_state() != DTLS_TRANSPORT_NEW) {
+    LOG(LS_ERROR) << "Can't set SRTP ciphers for a closed session";
     return false;
   }
 
diff --git a/webrtc/p2p/base/turnport.cc b/webrtc/p2p/base/turnport.cc
index 9ecc75ea28..7e0e64d6ed 100644
--- a/webrtc/p2p/base/turnport.cc
+++ b/webrtc/p2p/base/turnport.cc
@@ -927,14 +927,15 @@ void TurnPort::SendRequest(StunRequest* req, int delay) {
 
 void TurnPort::AddRequestAuthInfo(StunMessage* msg) {
   // If we've gotten the necessary data from the server, add it to our request.
-  VERIFY(!hash_.empty());
+  RTC_DCHECK(!hash_.empty());
   msg->AddAttribute(new StunByteStringAttribute(
       STUN_ATTR_USERNAME, credentials_.username));
   msg->AddAttribute(new StunByteStringAttribute(
       STUN_ATTR_REALM, realm_));
   msg->AddAttribute(new StunByteStringAttribute(
       STUN_ATTR_NONCE, nonce_));
-  VERIFY(msg->AddMessageIntegrity(hash()));
+  const bool success = msg->AddMessageIntegrity(hash());
+  RTC_DCHECK(success);
 }
 
 int TurnPort::Send(const void* data, size_t len,
@@ -943,8 +944,9 @@ int TurnPort::Send(const void* data, size_t len,
 }
 
 void TurnPort::UpdateHash() {
-  VERIFY(ComputeStunCredentialHash(credentials_.username, realm_,
-                                   credentials_.password, &hash_));
+  const bool success = ComputeStunCredentialHash(credentials_.username, realm_,
+                                                 credentials_.password, &hash_);
+  RTC_DCHECK(success);
 }
 
 bool TurnPort::UpdateNonce(StunMessage* response) {
@@ -1475,7 +1477,8 @@ int TurnEntry::Send(const void* data, size_t size, bool payload,
         STUN_ATTR_XOR_PEER_ADDRESS, ext_addr_));
     msg.AddAttribute(new StunByteStringAttribute(
         STUN_ATTR_DATA, data, size));
-    VERIFY(msg.Write(&buf));
+    const bool success = msg.Write(&buf);
+    RTC_DCHECK(success);
 
     // If we're sending real data, request a channel bind that we can use later.
     if (state_ == STATE_UNBOUND && payload) {
diff --git a/webrtc/pc/mediasession.cc b/webrtc/pc/mediasession.cc
index 910c72b2f0..c596951f93 100644
--- a/webrtc/pc/mediasession.cc
+++ b/webrtc/pc/mediasession.cc
@@ -19,6 +19,7 @@
 #include <utility>
 
 #include "webrtc/base/base64.h"
+#include "webrtc/base/common.h"
 #include "webrtc/base/checks.h"
 #include "webrtc/base/helpers.h"
 #include "webrtc/base/logging.h"
diff --git a/webrtc/pc/webrtcsdp.cc b/webrtc/pc/webrtcsdp.cc
index 11eefe5c3d..d5110fc854 100644
--- a/webrtc/pc/webrtcsdp.cc
+++ b/webrtc/pc/webrtcsdp.cc
@@ -1376,7 +1376,9 @@ void BuildMediaDescription(const ContentInfo* content_info,
         cricket::ConnectionRole role =
             transport_info->description.connection_role;
         std::string dtls_role_str;
-        VERIFY(cricket::ConnectionRoleToString(role, &dtls_role_str));
+        const bool success =
+            cricket::ConnectionRoleToString(role, &dtls_role_str);
+        RTC_DCHECK(success);
         InitAttrLine(kAttributeSetup, &os);
         os << kSdpDelimiterColon << dtls_role_str;
         AddLine(os.str(), message);