Do not use overlays when VR shell is enabled.

content/public/android/java/src/org/chromium/content/browser/ContentVideoView.java

Index: content/public/android/java/src/org/chromium/content/browser/ContentVideoView.java
diff --git a/content/public/android/java/src/org/chromium/content/browser/ContentVideoView.java b/content/public/android/java/src/org/chromium/content/browser/ContentVideoView.java
index e97a730ac12a809f0aaf2de498d104998c371955..d1a5b5d432af103e797ce609431d64d2eef6226f 100644
--- a/content/public/android/java/src/org/chromium/content/browser/ContentVideoView.java
+++ b/content/public/android/java/src/org/chromium/content/browser/ContentVideoView.java
@@ -109,6 +109,7 @@ public class ContentVideoView extends FrameLayout
                     }
                 }
             }
+            Log.d("amp_log", "measuring video view: " + width + "x" + height);
             setMeasuredDimension(width, height);
         }
     }
@@ -140,6 +141,7 @@ public class ContentVideoView extends FrameLayout
         super(context);
         mNativeContentVideoView = nativeContentVideoView;
         mEmbedder = embedder != null ? embedder : NULL_VIDEO_EMBEDDER;
+        Log.d("amp_log", "constructing video view, embedder=: " + embedder);
         mUmaRecorded = false;
         mPossibleAccidentalChange = false;
         mIsVideoLoaded = videoWidth > 0 && videoHeight > 0;
@@ -168,6 +170,7 @@ public class ContentVideoView extends FrameLayout
     }
 
     private void showContentVideoView() {
+        Log.d("amp_log", "showing video view, holder=: " + mVideoSurfaceView.getHolder());
         mVideoSurfaceView.getHolder().addCallback(this);
         addView(mVideoSurfaceView, new FrameLayout.LayoutParams(
                 ViewGroup.LayoutParams.WRAP_CONTENT,
@@ -230,12 +233,14 @@ public class ContentVideoView extends FrameLayout
 
     @CalledByNative
     private void onVideoSizeChanged(int width, int height) {
+        Log.d("amp_log", "video size changed: " + width + "x" + height);
         mVideoWidth = width;
         mVideoHeight = height;
 
         // We take non-zero frame size as an indication that the video has been loaded.
         if (!mIsVideoLoaded && mVideoWidth > 0 && mVideoHeight > 0) {
             mIsVideoLoaded = true;
+            Log.d("amp_log", "calling embedder fullscreen loaded, embedder: " + mEmbedder);
             mEmbedder.fullscreenVideoLoaded();
         }
 
@@ -266,6 +271,7 @@ public class ContentVideoView extends FrameLayout
 
     @Override
     public void surfaceCreated(SurfaceHolder holder) {
+        Log.d("amp_log", "surface created, holder= " + holder);
         mSurfaceHolder = holder;
         openVideo();
     }
@@ -301,6 +307,8 @@ public class ContentVideoView extends FrameLayout
             int videoWidth, int videoHeight) {
         ThreadUtils.assertOnUiThread();
         Context context = contentViewCore.getContext();
+        Log.d("amp_log", "creating new video view, cvc=" + contentViewCore);
+        Log.d("amp_log", "video size at creation: " + videoWidth + "x" + videoHeight);
         ContentVideoView videoView = new ContentVideoView(
                 context, nativeContentVideoView, embedder, videoWidth, videoHeight);
         return videoView;
@@ -313,6 +321,7 @@ public class ContentVideoView extends FrameLayout
 
     @CalledByNative
     public void exitFullscreen(boolean releaseMediaPlayer) {
+        Log.d("amp_log", "exiting full screen");
         if (mNativeContentVideoView != 0) {
             destroyContentVideoView(false);
             if (mUmaRecorded && !mPossibleAccidentalChange) {