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

chrome/renderer/plugins/plugin_preroller.cc

Index: chrome/renderer/plugins/plugin_preroller.cc
diff --git a/chrome/renderer/plugins/plugin_preroller.cc b/chrome/renderer/plugins/plugin_preroller.cc
index a98e77738da7197950fa75940b9b1f579f0c6a98..65cbb4766aeb1ef7bfcd6ae4a725479dbc64f990 100644
--- a/chrome/renderer/plugins/plugin_preroller.cc
+++ b/chrome/renderer/plugins/plugin_preroller.cc
@@ -28,7 +28,9 @@ PluginPreroller::PluginPreroller(content::RenderFrame* render_frame,
       identifier_(identifier),
       name_(name),
       message_(message),
-      throttler_(throttler) {
+      throttler_(throttler),
+      keyframe_width_(0),
+      keyframe_height_(0) {
   DCHECK(throttler);
   throttler_->AddObserver(this);
 }
@@ -52,16 +54,22 @@ void PluginPreroller::OnKeyframeExtracted(const SkBitmap* bitmap) {
   std::string data_url_body;
   base::Base64Encode(png_as_string, &data_url_body);
   keyframe_data_url_ = GURL(data_url_header + data_url_body);
+  keyframe_width_ = bitmap->width();

[Lei Zhang, 2015/03/18 00:19:32]

This is gfx::Size::SetToMin(), right?

[tommycli, 2015/03/18 00:39:33]

Done.

+  keyframe_height_ = bitmap->height();
 }
 
 void PluginPreroller::OnThrottleStateChange() {
   if (!throttler_->IsThrottled())
     return;
 
+  int width = std::min(keyframe_width_, throttler_->GetWidth());

[Lei Zhang, 2015/03/18 00:19:32]

This is gfx::Size::SetToMin() right?

[tommycli, 2015/03/18 00:39:33]

Done.

+  int height = std::min(keyframe_height_, throttler_->GetHeight());
+
   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(),
+          width, height);
   placeholder->SetPremadePlugin(throttler_);
   placeholder->set_power_saver_enabled(true);
   placeholder->set_allow_loading(true);