[Android cast] Make the local player exit seeking mode on cast start

chrome/android/java/src/org/chromium/chrome/browser/media/remote/RemoteMediaPlayerBridge.java

Index: chrome/android/java/src/org/chromium/chrome/browser/media/remote/RemoteMediaPlayerBridge.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/media/remote/RemoteMediaPlayerBridge.java b/chrome/android/java/src/org/chromium/chrome/browser/media/remote/RemoteMediaPlayerBridge.java
index 4c2f07404834a81eeba53a61d5036e8ab63c1b7c..9a9fddbbea81bdd26ee08f9805d993e006d91de0 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/media/remote/RemoteMediaPlayerBridge.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/media/remote/RemoteMediaPlayerBridge.java
@@ -9,9 +9,9 @@
 import android.graphics.Bitmap;
 import android.media.MediaPlayer;
 import android.os.Build;
-import android.util.Log;
 
 import org.chromium.base.CommandLine;
+import org.chromium.base.Log;
 import org.chromium.base.annotations.CalledByNative;
 import org.chromium.base.annotations.JNINamespace;
 import org.chromium.chrome.browser.ChromeSwitches;
@@ -30,6 +30,8 @@
     private final long mStartPositionMillis;
     private long mNativeRemoteMediaPlayerBridge;
 
+    // TODO(dgn) We don't create MediaPlayerListener using a RemoteMediaPlayerBridge anymore so
+    //           the inheritance and the extra listeners can now go away. (https://crbug.com/577110)
     private MediaPlayer.OnCompletionListener mOnCompletionListener;
     private MediaPlayer.OnSeekCompleteListener mOnSeekCompleteListener;
     private MediaPlayer.OnErrorListener mOnErrorListener;
@@ -73,9 +75,13 @@ public void onError() {
 
         @Override
         public void onSeekCompleted() {
-            if (mActive && mOnSeekCompleteListener != null) {
-                mOnSeekCompleteListener.onSeekComplete(null);
+            if (!mActive) return;
+
+            if (mNativeRemoteMediaPlayerBridge != 0) {
+                nativeOnSeekComplete(mNativeRemoteMediaPlayerBridge, getCurrentPosition());
             }
+
+            if (mOnSeekCompleteListener != null) mOnSeekCompleteListener.onSeekComplete(null);
         }
 
         @Override
@@ -383,4 +389,5 @@ private native void nativeOnRouteAvailabilityChanged(long nativeRemoteMediaPlaye
     private native void nativeOnCastStarting(long nativeRemoteMediaPlayerBridge,
             String castingMessage);
     private native void nativeOnCastStopping(long nativeRemoteMediaPlayerBridge);
+    private native void nativeOnSeekComplete(long nativeRemoteMediaPlayerBridge, int position);
 }