diff --git a/tools-webrtc/android/suppressions.xml b/tools-webrtc/android/suppressions.xml
index b8b9987a3d..d6250e06a8 100644
--- a/tools-webrtc/android/suppressions.xml
+++ b/tools-webrtc/android/suppressions.xml
@@ -7,7 +7,6 @@
        to suppress.py. -->
   <issue id="NewApi"></issue>
 
-  <issue id="InlinedApi" severity="ignore"/>
   <issue id="Assert" severity="ignore"/>
   <issue id="UseSparseArrays" severity="ignore"/>
 
@@ -33,4 +32,9 @@
   <issue id="MissingApplicationIcon" severity="ignore"/>
   <issue id="AllowBackup" severity="ignore"/>
   <issue id="MissingVersion" severity="ignore"/>
+
+  <!-- Ignore all lint errors in Chromium code. -->
+  <issue id="all">
+    <ignore path="**/org/chromium/**/*.java" />
+  </issue>
 </lint>
diff --git a/webrtc/examples/androidapp/src/org/appspot/apprtc/CallActivity.java b/webrtc/examples/androidapp/src/org/appspot/apprtc/CallActivity.java
index 14c2bfe658..9864efba68 100644
--- a/webrtc/examples/androidapp/src/org/appspot/apprtc/CallActivity.java
+++ b/webrtc/examples/androidapp/src/org/appspot/apprtc/CallActivity.java
@@ -10,6 +10,7 @@
 
 package org.appspot.apprtc;
 
+import android.annotation.TargetApi;
 import android.app.Activity;
 import android.app.AlertDialog;
 import android.app.FragmentTransaction;
@@ -20,6 +21,7 @@ import android.content.pm.PackageManager;
 import android.media.projection.MediaProjection;
 import android.media.projection.MediaProjectionManager;
 import android.net.Uri;
+import android.os.Build;
 import android.os.Bundle;
 import android.os.Handler;
 import android.util.DisplayMetrics;
@@ -191,8 +193,7 @@ public class CallActivity extends Activity implements AppRTCClient.SignalingEven
     getWindow().addFlags(LayoutParams.FLAG_FULLSCREEN | LayoutParams.FLAG_KEEP_SCREEN_ON
         | LayoutParams.FLAG_DISMISS_KEYGUARD | LayoutParams.FLAG_SHOW_WHEN_LOCKED
         | LayoutParams.FLAG_TURN_SCREEN_ON);
-    getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
-        | View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
+    getWindow().getDecorView().setSystemUiVisibility(getSystemUiVisibility());
     setContentView(R.layout.activity_call);
 
     iceConnected = false;
@@ -362,16 +363,30 @@ public class CallActivity extends Activity implements AppRTCClient.SignalingEven
         getApplicationContext(), peerConnectionParameters, CallActivity.this);
 
     if (screencaptureEnabled) {
-      MediaProjectionManager mediaProjectionManager =
-          (MediaProjectionManager) getApplication().getSystemService(
-              Context.MEDIA_PROJECTION_SERVICE);
-      startActivityForResult(
-          mediaProjectionManager.createScreenCaptureIntent(), CAPTURE_PERMISSION_REQUEST_CODE);
+      startScreenCapture();
     } else {
       startCall();
     }
   }
 
+  @TargetApi(19)
+  private static int getSystemUiVisibility() {
+    int flags = View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_FULLSCREEN;
+    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
+      flags |= View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY;
+    }
+    return flags;
+  }
+
+  @TargetApi(21)
+  private void startScreenCapture() {
+    MediaProjectionManager mediaProjectionManager =
+        (MediaProjectionManager) getApplication().getSystemService(
+            Context.MEDIA_PROJECTION_SERVICE);
+    startActivityForResult(
+        mediaProjectionManager.createScreenCaptureIntent(), CAPTURE_PERMISSION_REQUEST_CODE);
+  }
+
   @Override
   public void onActivityResult(int requestCode, int resultCode, Intent data) {
     if (requestCode != CAPTURE_PERMISSION_REQUEST_CODE)
diff --git a/webrtc/modules/audio_device/android/java/src/org/webrtc/voiceengine/WebRtcAudioManager.java b/webrtc/modules/audio_device/android/java/src/org/webrtc/voiceengine/WebRtcAudioManager.java
index eb4702b444..ab17eece1a 100644
--- a/webrtc/modules/audio_device/android/java/src/org/webrtc/voiceengine/WebRtcAudioManager.java
+++ b/webrtc/modules/audio_device/android/java/src/org/webrtc/voiceengine/WebRtcAudioManager.java
@@ -10,8 +10,6 @@
 
 package org.webrtc.voiceengine;
 
-import org.webrtc.Logging;
-
 import android.annotation.TargetApi;
 import android.content.Context;
 import android.content.pm.PackageManager;
@@ -20,9 +18,9 @@ import android.media.AudioManager;
 import android.media.AudioRecord;
 import android.media.AudioTrack;
 import android.os.Build;
-
 import java.util.Timer;
 import java.util.TimerTask;
+import org.webrtc.Logging;
 
 // WebRtcAudioManager handles tasks that uses android.media.AudioManager.
 // At construction, storeAudioParameters() is called and it retrieves
@@ -248,6 +246,7 @@ public class WebRtcAudioManager {
 
   // Returns true if the device has professional audio level of functionality
   // and therefore supports the lowest possible round-trip latency.
+  @TargetApi(23)
   private boolean isProAudioSupported() {
     return WebRtcAudioUtils.runningOnMarshmallowOrHigher()
         && context.getPackageManager().hasSystemFeature(PackageManager.FEATURE_AUDIO_PRO);
diff --git a/webrtc/modules/audio_device/android/java/src/org/webrtc/voiceengine/WebRtcAudioTrack.java b/webrtc/modules/audio_device/android/java/src/org/webrtc/voiceengine/WebRtcAudioTrack.java
index 7c3a672576..ca37dfe495 100644
--- a/webrtc/modules/audio_device/android/java/src/org/webrtc/voiceengine/WebRtcAudioTrack.java
+++ b/webrtc/modules/audio_device/android/java/src/org/webrtc/voiceengine/WebRtcAudioTrack.java
@@ -10,16 +10,15 @@
 
 package org.webrtc.voiceengine;
 
-import org.webrtc.Logging;
-
+import android.annotation.TargetApi;
 import android.content.Context;
 import android.media.AudioFormat;
 import android.media.AudioManager;
 import android.media.AudioTrack;
 import android.os.Process;
-
 import java.lang.Thread;
 import java.nio.ByteBuffer;
+import org.webrtc.Logging;
 
 public class WebRtcAudioTrack {
   private static final boolean DEBUG = false;
@@ -130,6 +129,7 @@ public class WebRtcAudioTrack {
       audioTrack.flush();
     }
 
+    @TargetApi(21)
     private int writeOnLollipop(AudioTrack audioTrack, ByteBuffer byteBuffer, int sizeInBytes) {
       return audioTrack.write(byteBuffer, sizeInBytes, AudioTrack.WRITE_BLOCKING);
     }
diff --git a/webrtc/sdk/android/api/org/webrtc/NetworkMonitorAutoDetect.java b/webrtc/sdk/android/api/org/webrtc/NetworkMonitorAutoDetect.java
index 3046ab20c5..6bd727fd7f 100644
--- a/webrtc/sdk/android/api/org/webrtc/NetworkMonitorAutoDetect.java
+++ b/webrtc/sdk/android/api/org/webrtc/NetworkMonitorAutoDetect.java
@@ -10,9 +10,6 @@
 
 package org.webrtc;
 
-import static android.net.NetworkCapabilities.NET_CAPABILITY_INTERNET;
-import static android.net.NetworkCapabilities.TRANSPORT_CELLULAR;
-
 import android.Manifest.permission;
 import android.annotation.SuppressLint;
 import android.content.BroadcastReceiver;
@@ -31,7 +28,6 @@ import android.net.wifi.WifiInfo;
 import android.net.wifi.WifiManager;
 import android.os.Build;
 import android.telephony.TelephonyManager;
-
 import java.util.ArrayList;
 import java.util.List;
 
@@ -327,14 +323,17 @@ public class NetworkMonitorAutoDetect extends BroadcastReceiver {
         return false;
       }
       final NetworkCapabilities capabilities = connectivityManager.getNetworkCapabilities(network);
-      return capabilities != null && capabilities.hasCapability(NET_CAPABILITY_INTERNET);
+      return capabilities != null
+          && capabilities.hasCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET);
     }
 
     /** Only callable on Lollipop and newer releases. */
     @SuppressLint("NewApi")
     public void registerNetworkCallback(NetworkCallback networkCallback) {
       connectivityManager.registerNetworkCallback(
-          new NetworkRequest.Builder().addCapability(NET_CAPABILITY_INTERNET).build(),
+          new NetworkRequest.Builder()
+              .addCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET)
+              .build(),
           networkCallback);
     }
 
@@ -342,7 +341,8 @@ public class NetworkMonitorAutoDetect extends BroadcastReceiver {
     @SuppressLint("NewApi")
     public void requestMobileNetwork(NetworkCallback networkCallback) {
       NetworkRequest.Builder builder = new NetworkRequest.Builder();
-      builder.addCapability(NET_CAPABILITY_INTERNET).addTransportType(TRANSPORT_CELLULAR);
+      builder.addCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET)
+          .addTransportType(NetworkCapabilities.TRANSPORT_CELLULAR);
       connectivityManager.requestNetwork(builder.build(), networkCallback);
     }
 
diff --git a/webrtc/sdk/android/instrumentationtests/AndroidManifest.xml b/webrtc/sdk/android/instrumentationtests/AndroidManifest.xml
index 27a9389d1b..15c9e6779e 100644
--- a/webrtc/sdk/android/instrumentationtests/AndroidManifest.xml
+++ b/webrtc/sdk/android/instrumentationtests/AndroidManifest.xml
@@ -15,7 +15,7 @@
     <uses-feature android:name="android.hardware.camera.autofocus" />
     <uses-feature android:glEsVersion="0x00020000" android:required="true" />
 
-    <uses-sdk android:minSdkVersion="14" android:targetSdkVersion="21" />
+    <uses-sdk android:minSdkVersion="16" android:targetSdkVersion="21" />
 
     <uses-permission android:name="android.permission.CAMERA" />
     <uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />
diff --git a/webrtc/sdk/android/instrumentationtests/src/org/webrtc/Camera2CapturerTest.java b/webrtc/sdk/android/instrumentationtests/src/org/webrtc/Camera2CapturerTest.java
index 86a74c2936..a752cf09bc 100644
--- a/webrtc/sdk/android/instrumentationtests/src/org/webrtc/Camera2CapturerTest.java
+++ b/webrtc/sdk/android/instrumentationtests/src/org/webrtc/Camera2CapturerTest.java
@@ -14,6 +14,7 @@ import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.fail;
 
+import android.annotation.TargetApi;
 import android.content.Context;
 import android.hardware.camera2.CameraAccessException;
 import android.hardware.camera2.CameraDevice;
@@ -31,6 +32,7 @@ import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
+@TargetApi(21)
 @RunWith(BaseJUnit4ClassRunner.class)
 public class Camera2CapturerTest {
   static final String TAG = "Camera2CapturerTest";