Bug 801627 - Fix fullscreen Flash on Android r=blassey

mobile/android/base/GeckoApp.java

@@ -1359,7 +1359,7 @@ abstract public class GeckoApp
         // a deadlock, see comment below in FullScreenHolder
         mMainHandler.post(new Runnable() {
             public void run() {
-                mLayerView.setVisibility(View.VISIBLE);
+                mLayerView.show();
             }
         });
 
@@ -2651,7 +2651,7 @@ abstract public class GeckoApp
 
             mMainHandler.post(new Runnable() { 
                 public void run() {
-                    mLayerView.setVisibility(View.INVISIBLE);
+                    mLayerView.hide();
                 }
             });
         }

mobile/android/base/gfx/LayerView.java

@@ -110,6 +110,16 @@ public class LayerView extends FrameLayout {
         GeckoAccessibility.setDelegate(this);
     }
 
+    public void show() {
+        View view = mTextureView != null ? mTextureView : mSurfaceView;
+        view.setVisibility(View.VISIBLE);
+    }
+
+    public void hide() {
+        View view = mTextureView != null ? mTextureView : mSurfaceView;
+        view.setVisibility(View.INVISIBLE);
+    }
+
     public void destroy() {
         if (mLayerClient != null) {
             mLayerClient.destroy();