Removes usage of native base::android::GetApplicationContext()

webrtc/modules/audio_device/android/java/src/org/webrtc/voiceengine/WebRtcAudioTrack.java

Index: webrtc/modules/audio_device/android/java/src/org/webrtc/voiceengine/WebRtcAudioTrack.java
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 65c52077c8e9bf054b9a643cba92aa2ed82159e6..ce23523c5fb22335f9e8ec6d9f44b64e41f2eb43 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
@@ -21,6 +21,8 @@ import java.lang.Thread;
 import java.nio.ByteBuffer;
 import org.webrtc.Logging;
 
+import org.chromium.base.ContextUtils;
+
 public class WebRtcAudioTrack {
   private static final boolean DEBUG = false;
 
@@ -36,7 +38,6 @@ public class WebRtcAudioTrack {
   // Average number of callbacks per second.
   private static final int BUFFERS_PER_SECOND = 1000 / CALLBACK_BUFFER_SIZE_MS;
 
-  private final Context context;
   private final long nativeAudioTrack;
   private final AudioManager audioManager;
 
@@ -165,11 +166,11 @@ public class WebRtcAudioTrack {
     }
   }
 
-  WebRtcAudioTrack(Context context, long nativeAudioTrack) {
+  WebRtcAudioTrack(long nativeAudioTrack) {
     Logging.d(TAG, "ctor" + WebRtcAudioUtils.getThreadInfo());
-    this.context = context;
     this.nativeAudioTrack = nativeAudioTrack;
-    audioManager = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE);
+    audioManager = (AudioManager) ContextUtils.getApplicationContext().getSystemService(
+        Context.AUDIO_SERVICE);
     if (DEBUG) {
       WebRtcAudioUtils.logDeviceInfo(TAG);
     }