mustash: enable GPU Compositing in renderer

content/browser/renderer_host/render_widget_host_view_mus.cc

Index: content/browser/renderer_host/render_widget_host_view_mus.cc
diff --git a/content/browser/renderer_host/render_widget_host_view_mus.cc b/content/browser/renderer_host/render_widget_host_view_mus.cc
index 08e0058c355185bd42011ae0efded45d41c93d59..8a12e156e7579eebcb81a6de935a2804f4a0e5a9 100644
--- a/content/browser/renderer_host/render_widget_host_view_mus.cc
+++ b/content/browser/renderer_host/render_widget_host_view_mus.cc
@@ -62,7 +62,12 @@ bool RenderWidgetHostViewMus::IsShowing() {
 
 void RenderWidgetHostViewMus::SetSize(const gfx::Size& size) {
   size_ = size;
-  window_->window()->SetBounds(gfx::Rect(size));
+  gfx::Rect bounds = window_->window()->bounds();
+  // TODO(fsamuel): figure out position.

[Ben Goodger (Google), 2015/12/01 18:44:14]

I suspect you'll end up needing to have an aura::Window in thsi class (e.g. to
implement GetNativeView/Window). You should be able to obtain the bounds from
that.

[Peng, 2015/12/01 19:41:38]

Talked to fsamuel, and he will take care of it.

Acknowledged.

+  bounds.set_x(10);
+  bounds.set_y(150);
+  bounds.set_size(size);
+  window_->window()->SetBounds(bounds);
   host_->WasResized();
 }