Hide fullscreen rotation jank

chrome/browser/android/compositor/compositor_view.cc

Index: chrome/browser/android/compositor/compositor_view.cc
diff --git a/chrome/browser/android/compositor/compositor_view.cc b/chrome/browser/android/compositor/compositor_view.cc
index 4b525711cbc5f59c6f6a1e0f101bafb52872234a..c5d5a4f87da9907df083c2188a829c962e022abb 100644
--- a/chrome/browser/android/compositor/compositor_view.cc
+++ b/chrome/browser/android/compositor/compositor_view.cc
@@ -185,10 +185,11 @@ void CompositorView::SetLayoutBounds(JNIEnv* env,
 }
 
 void CompositorView::SetBackground(bool visible, SkColor color) {
-  if (overlay_video_mode_)
-    visible = false;
   root_layer_->SetBackgroundColor(color);

[Khushal, 2017/06/23 03:09:51]

Another thing, this root_layer_ doesn't need to be a solid color layer now. It
can be a simple layer.

   root_layer_->SetIsDrawable(visible);
+  compositor_->SetBackgroundColor(color);
+  compositor_->SetHasTransparentBackground(SkColorGetA(color) ==
+                                           SK_AlphaTRANSPARENT);
 }
 
 void CompositorView::SetOverlayVideoMode(JNIEnv* env,
@@ -197,7 +198,6 @@ void CompositorView::SetOverlayVideoMode(JNIEnv* env,
   if (overlay_video_mode_ == enabled)
     return;
   overlay_video_mode_ = enabled;
-  compositor_->SetHasTransparentBackground(enabled);
   SetNeedsComposite(env, object);
 }