Add unit tests for media.remote.AbstractMediaRouteController

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

Index: chrome/android/java/src/org/chromium/chrome/browser/media/remote/AbstractMediaRouteController.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/media/remote/AbstractMediaRouteController.java b/chrome/android/java/src/org/chromium/chrome/browser/media/remote/AbstractMediaRouteController.java
index 7fb0a749bff52aab5deac24d0343ccf3e8d5066b..d030963088027cb17e4c10cd02db806b0e84c8a6 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/media/remote/AbstractMediaRouteController.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/media/remote/AbstractMediaRouteController.java
@@ -20,6 +20,7 @@
 
 import org.chromium.base.ApplicationStatus;
 import org.chromium.base.CommandLine;
+import org.chromium.base.VisibleForTesting;
 import org.chromium.chrome.ChromeSwitches;
 import org.chromium.chrome.R;
 import org.chromium.chrome.browser.media.remote.RemoteVideoInfo.PlayerState;
@@ -485,13 +486,8 @@ protected void stopWatchingRouteSelection() {
         }
     }
 
-    protected void updateState(int state) {
-        if (mDebug) {
-            Log.d(TAG, "updateState oldState: " + this.mPlaybackState + " newState: " + state);
-        }
-
-        PlayerState oldState = this.mPlaybackState;
-
+    @VisibleForTesting
+    void setPlayerStateForMediaItemState(int state) {
         PlayerState playerState = PlayerState.STOPPED;
         switch (state) {
             case MediaItemStatus.PLAYBACK_STATE_BUFFERING:
@@ -526,13 +522,22 @@ protected void updateState(int state) {
                 break;
         }
 
-        this.mPlaybackState = playerState;
+        mPlaybackState = playerState;
+    }
+
+    protected void updateState(int state) {
+        if (mDebug) {
+            Log.d(TAG, "updateState oldState: " + mPlaybackState + " newState: " + state);
+        }
+
+        PlayerState oldState = mPlaybackState;
+        setPlayerStateForMediaItemState(state);
 
         for (UiListener listener : mUiListeners) {
-            listener.onPlaybackStateChanged(oldState, playerState);
+            listener.onPlaybackStateChanged(oldState, mPlaybackState);
         }
 
-        if (mMediaStateListener != null) mMediaStateListener.onPlaybackStateChanged(playerState);
+        if (mMediaStateListener != null) mMediaStateListener.onPlaybackStateChanged(mPlaybackState);
 
         if (oldState != mPlaybackState) {
             // We need to persist our state in case we get killed.