diff --git a/webrtc/base/thread.cc b/webrtc/base/thread.cc
index 66542bb3d9..b5be475fb3 100644
--- a/webrtc/base/thread.cc
+++ b/webrtc/base/thread.cc
@@ -518,21 +518,4 @@ AutoThread::~AutoThread() {
   }
 }
 
-#if defined(WEBRTC_WIN)
-ComThread::~ComThread() {
-  Stop();
-}
-
-void ComThread::Run() {
-  HRESULT hr = CoInitializeEx(nullptr, COINIT_MULTITHREADED);
-  RTC_DCHECK(SUCCEEDED(hr));
-  if (SUCCEEDED(hr)) {
-    Thread::Run();
-    CoUninitialize();
-  } else {
-    LOG(LS_ERROR) << "CoInitialize failed, hr=" << hr;
-  }
-}
-#endif
-
 }  // namespace rtc
diff --git a/webrtc/base/thread.h b/webrtc/base/thread.h
index 398063d263..01c80501c8 100644
--- a/webrtc/base/thread.h
+++ b/webrtc/base/thread.h
@@ -306,21 +306,6 @@ class AutoThread : public Thread {
   RTC_DISALLOW_COPY_AND_ASSIGN(AutoThread);
 };
 
-// Win32 extension for threads that need to use COM
-#if defined(WEBRTC_WIN)
-class ComThread : public Thread {
- public:
-  ComThread() {}
-  ~ComThread() override;
-
- protected:
-  void Run() override;
-
- private:
-  RTC_DISALLOW_COPY_AND_ASSIGN(ComThread);
-};
-#endif
-
 // Provides an easy way to install/uninstall a socketserver on a thread.
 class SocketServerScope {
  public:
diff --git a/webrtc/base/thread_unittest.cc b/webrtc/base/thread_unittest.cc
index 39f2b2e2cc..35ea60468c 100644
--- a/webrtc/base/thread_unittest.cc
+++ b/webrtc/base/thread_unittest.cc
@@ -413,12 +413,6 @@ TEST(ThreadTest, SetNameOnSignalQueueDestroyed) {
   Thread* thread2 = new AutoThread();
   SetNameOnSignalQueueDestroyedTester tester2(thread2);
   delete thread2;
-
-#if defined(WEBRTC_WIN)
-  Thread* thread3 = new ComThread();
-  SetNameOnSignalQueueDestroyedTester tester3(thread3);
-  delete thread3;
-#endif
 }
 
 class AsyncInvokeTest : public testing::Test {
@@ -781,29 +775,3 @@ TEST_F(GuardedAsyncInvokeTest, FlushWithIds) {
   EXPECT_FALSE(flag1.get());
   EXPECT_TRUE(flag2.get());
 }
-
-#if defined(WEBRTC_WIN)
-class ComThreadTest : public testing::Test, public MessageHandler {
- public:
-  ComThreadTest() : done_(false) {}
- protected:
-  virtual void OnMessage(Message* message) {
-    HRESULT hr = CoInitializeEx(nullptr, COINIT_MULTITHREADED);
-    // S_FALSE means the thread was already inited for a multithread apartment.
-    EXPECT_EQ(S_FALSE, hr);
-    if (SUCCEEDED(hr)) {
-      CoUninitialize();
-    }
-    done_ = true;
-  }
-  bool done_;
-};
-
-TEST_F(ComThreadTest, ComInited) {
-  Thread* thread = new ComThread();
-  EXPECT_TRUE(thread->Start());
-  thread->Post(RTC_FROM_HERE, this, 0);
-  EXPECT_TRUE_WAIT(done_, 1000);
-  delete thread;
-}
-#endif