Plugin Power Saver: Add UI Overlay to throttled plugin using placeholder.

content/renderer/pepper/pepper_webplugin_impl.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 "content/renderer/pepper/pepper_webplugin_impl.h"
 
 #include <cmath>
 
 #include "base/debug/crash_logging.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 165 matching lines @@
       cut_outs.push_back(cut_outs_rects[i]);
     instance_->ViewChanged(plugin_rect_, clip_rect, cut_outs);
   }
 }
 
 void PepperWebPluginImpl::updateFocus(bool focused,
                                       blink::WebFocusType focus_type) {
   instance_->SetWebKitFocus(focused);
 }
 
-void PepperWebPluginImpl::updateVisibility(bool visible) {}
+void PepperWebPluginImpl::updateVisibility(bool visible) {
+  instance_->UpdateVisibility(visible);
+}
 
 bool PepperWebPluginImpl::acceptsInputEvents() { return true; }
 
 bool PepperWebPluginImpl::handleInputEvent(const blink::WebInputEvent& event,
                                            blink::WebCursorInfo& cursor_info) {
   if (instance_->FlashIsFullscreenOrPending())
     return false;
   return instance_->HandleInputEvent(event, &cursor_info);
 }
 
@@ skipping 87 matching lines @@
 
 bool PepperWebPluginImpl::canRotateView() { return instance_->CanRotateView(); }
 
 void PepperWebPluginImpl::rotateView(RotationType type) {
   instance_->RotateView(type);
 }
 
 bool PepperWebPluginImpl::isPlaceholder() { return false; }
 
 }  // namespace content