Hide fullscreen rotation jank

content/browser/renderer_host/compositor_impl_android.cc

Index: content/browser/renderer_host/compositor_impl_android.cc
diff --git a/content/browser/renderer_host/compositor_impl_android.cc b/content/browser/renderer_host/compositor_impl_android.cc
index 006a51dc8552f337ae44b8e8fad8034fc52f3b17..f6cdbd02276ae18451544945b11eb8161ceb5a14 100644
--- a/content/browser/renderer_host/compositor_impl_android.cc
+++ b/content/browser/renderer_host/compositor_impl_android.cc
@@ -599,15 +599,8 @@ void CompositorImpl::SetHasTransparentBackground(bool transparent) {
   has_transparent_background_ = transparent;
   if (host_) {
     host_->set_has_transparent_background(transparent);
-
-    // Give a delay in setting the background color to avoid the color for
-    // the normal mode (white) affecting the UI transition.
-    base::ThreadTaskRunnerHandle::Get().get()->PostDelayedTask(
-        FROM_HERE,
-        base::Bind(&CompositorImpl::SetBackgroundColor,
-                   weak_factory_.GetWeakPtr(),
-                   transparent ? SK_ColorBLACK : SK_ColorWHITE),
-        base::TimeDelta::FromMilliseconds(500));
+    // TODO(steimel): Set the color based on the color of the renderer frame.

[aelias_OOO_until_Jul13, 2017/06/16 22:46:40]

This is done in OnFrameMetadataUpdated right now.  Please refactor this so that
there's a unified logic that calls SetBackgroundColor by considering all the
current state instead of having these different subsystems fight each other for
authority over it.

[steimel, 2017/06/22 01:32:11]

Done.

+    SetBackgroundColor(transparent ? SK_ColorBLACK : SK_ColorWHITE);
   }
 }