chrome: Add out-of-line copy ctors for complex classes.

chrome/renderer/plugins/power_saver_info.h

 // Copyright 2015 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 CHROME_RENDERER_PLUGINS_POWER_SAVER_INFO_H_
 #define CHROME_RENDERER_PLUGINS_POWER_SAVER_INFO_H_
 
 #include <string>
 
 #include "ui/gfx/geometry/size.h"
 #include "url/gurl.h"
 
 namespace blink {
 struct WebPluginParams;
 }
 
 namespace content {
 class RenderFrame;
 struct WebPluginInfo;
 }
 
 // This contains information specifying the plugin's Power Saver behavior.
 // The default constructor has Plugin Power Saver disabled.
 struct PowerSaverInfo {
   PowerSaverInfo();
+  PowerSaverInfo(const PowerSaverInfo& other);
 
   // Determines the PowerSaverInfo using the peripheral content heuristic.
   static PowerSaverInfo Get(content::RenderFrame* render_frame,
                             bool power_saver_setting_on,
                             const blink::WebPluginParams& params,
                             const content::WebPluginInfo& plugin_info,
                             const GURL& document_url);
 
   // Whether power saver should be enabled.
   bool power_saver_enabled;
 
   // Whether the plugin should be deferred because it is in a background tab.
   bool blocked_for_background_tab;
 
   // The poster image specified in image 'srcset' attribute format.
   std::string poster_attribute;
 
   // Used to resolve relative paths in |poster_attribute|.
   GURL base_url;
 
   // Specify this to provide partially obscured plugins a centered poster image.
   gfx::Size custom_poster_size;
 };
 
 #endif  // CHROME_RENDERER_PLUGINS_POWER_SAVER_INFO_H_