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

chrome/renderer/plugins/power_saver_info.cc

 // 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.
 
 #include <stddef.h>
 
 #include "base/command_line.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/renderer/plugins/power_saver_info.h"
@@ skipping 55 matching lines @@
     }
   }
   return std::string();
 }
 
 }  // namespace
 
 PowerSaverInfo::PowerSaverInfo()
     : power_saver_enabled(false), blocked_for_background_tab(false) {}
 
+PowerSaverInfo::PowerSaverInfo(const PowerSaverInfo& other) = default;
+
 PowerSaverInfo PowerSaverInfo::Get(content::RenderFrame* render_frame,
                                    bool power_saver_setting_on,
                                    const blink::WebPluginParams& params,
                                    const content::WebPluginInfo& plugin_info,
                                    const GURL& document_url) {
   base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
   std::string override_for_testing = command_line->GetSwitchValueASCII(
       switches::kOverridePluginPowerSaverForTesting);
 
   // This feature has only been tested thoroughly with Flash thus far.
@@ skipping 31 matching lines @@
       info.poster_attribute = GetPluginInstancePosterAttribute(params);
       info.base_url = document_url;
     }
   }
 
   if (is_flash)
     TrackPosterParamPresence(params, info.power_saver_enabled);
 
   return info;
 }