Fix assorted issues with remote CoreAnimation

ui/compositor/compositor.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/compositor/compositor.h"
 
 #include <algorithm>
 #include <deque>
 
 #include "base/bind.h"
@@ skipping 258 matching lines @@
     if (root_layer_)
       root_layer_->OnDeviceScaleFactorChanged(scale);
   }
 }
 
 void Compositor::SetBackgroundColor(SkColor color) {
   host_->set_background_color(color);
   ScheduleDraw();
 }
 
+void Compositor::SetVisible(bool visible) {
+  host_->SetVisible(visible);
+}
+
 scoped_refptr<CompositorVSyncManager> Compositor::vsync_manager() const {
   return vsync_manager_;
 }
 
 void Compositor::AddObserver(CompositorObserver* observer) {
 #if defined(OS_MACOSX)
   // Debugging instrumentation for crbug.com/401630.
   // TODO(ccameron): remove this.
   CHECK(observer);
   if (!observer_list_.HasObserver(observer))
@@ skipping 151 matching lines @@
     // Call ScheduleDraw() instead of Draw() in order to allow other
     // CompositorObservers to be notified before starting another
     // draw cycle.
     ScheduleDraw();
   }
   FOR_EACH_OBSERVER(
       CompositorObserver, observer_list_, OnCompositingEnded(this));
 }
 
 }  // namespace ui