content: Cleanup class/struct forward declarations

content/renderer/pepper/plugin_power_saver_helper.h

 // 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.
 
 #ifndef CONTENT_RENDERER_PEPPER_PLUGIN_POWER_SAVER_HELPER_H_
 #define CONTENT_RENDERER_PEPPER_PLUGIN_POWER_SAVER_HELPER_H_
 
 #include <set>
 #include <vector>
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "content/common/content_export.h"
 #include "content/public/renderer/render_frame.h"
 #include "content/public/renderer/render_frame_observer.h"
 #include "url/origin.h"
 
-namespace blink {
-struct WebPluginParams;
-struct WebRect;
-}
-
 namespace gfx {
 class Size;
 }
 
 namespace content {
 
 class CONTENT_EXPORT PluginPowerSaverHelper : public RenderFrameObserver {
  public:
   explicit PluginPowerSaverHelper(RenderFrame* render_frame);
   ~PluginPowerSaverHelper() override;
@@ skipping 35 matching lines @@
 
   // Set of peripheral plugins eligible to be unthrottled ex post facto.
   std::vector<PeripheralPlugin> peripheral_plugins_;
 
   DISALLOW_COPY_AND_ASSIGN(PluginPowerSaverHelper);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_PEPPER_PLUGIN_POWER_SAVER_HELPER_H_