Notifying the Out of Process Renderer about Visibility Change of a Remote Frame

content/browser/frame_host/render_widget_host_view_child_frame.cc

 // Copyright 2014 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 "content/browser/frame_host/render_widget_host_view_child_frame.h"
 
 #include "cc/surfaces/surface.h"
 #include "cc/surfaces/surface_factory.h"
 #include "cc/surfaces/surface_manager.h"
 #include "cc/surfaces/surface_sequence.h"
@@ skipping 464 matching lines @@
   return BrowserAccessibilityManager::Create(
       BrowserAccessibilityManager::GetEmptyDocument(), delegate);
 }
 
 void RenderWidgetHostViewChildFrame::ClearCompositorSurfaceIfNecessary() {
   if (surface_factory_ && !surface_id_.is_null())
     surface_factory_->Destroy(surface_id_);
   surface_id_ = cc::SurfaceId();
 }
 
+// This method is called only when the renderer changes the visibility of the
+// corresponding frame.
+void RenderWidgetHostViewChildFrame::SetVisibility(bool visible) {
+  if (host_->delegate()->DidForwardVisibilityChangeToGuest(visible))
+    return;
+  if (visible)
+    Show();
+  else
+    Hide();
+}
+
 }  // namespace content