Plugin Power Saver: Throttle 'large' plugins that appear small.

chrome/renderer/plugins/plugin_preroller.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 "chrome/renderer/plugins/plugin_preroller.h"
 
 #include "base/base64.h"
 #include "chrome/grit/renderer_resources.h"
 #include "chrome/renderer/plugins/chrome_plugin_placeholder.h"
 #include "third_party/WebKit/public/platform/WebRect.h"
@@ skipping 34 matching lines @@
     return;
   }
 
   base::StringPiece png_as_string(reinterpret_cast<char*>(&png_data[0]),
                                   png_data.size());
 
   std::string data_url_header = "data:image/png;base64,";
   std::string data_url_body;
   base::Base64Encode(png_as_string, &data_url_body);
   keyframe_data_url_ = GURL(data_url_header + data_url_body);
+  keyframe_size_.SetSize(bitmap->width(), bitmap->height());
 }
 
 void PluginPreroller::OnThrottleStateChange() {
   if (!throttler_->IsThrottled())
     return;
 
+  keyframe_size_.SetToMin(throttler_->GetSize());
+
   ChromePluginPlaceholder* placeholder =
       ChromePluginPlaceholder::CreateBlockedPlugin(
           render_frame(), frame_, params_, info_, identifier_, name_,
-          IDR_PLUGIN_POSTER_HTML, message_, keyframe_data_url_.spec(), GURL());
+          IDR_PLUGIN_POSTER_HTML, message_, keyframe_data_url_.spec(), GURL(),
+          keyframe_size_);
   placeholder->SetPremadePlugin(throttler_);
   placeholder->set_power_saver_enabled(true);
   placeholder->set_allow_loading(true);
 
   blink::WebPluginContainer* container =
       throttler_->GetWebPlugin()->container();
   container->setPlugin(placeholder->plugin());
 
   bool success = placeholder->plugin()->initialize(container);
   DCHECK(success);
 
   container->invalidate();
   container->reportGeometry();
 
   delete this;
 }
 
 void PluginPreroller::OnThrottlerDestroyed() {
   throttler_ = nullptr;
   delete this;
 }