Plugin Power Saver: Do not always throttle plugins with posters.

content/public/renderer/render_frame.h

Index: content/public/renderer/render_frame.h
diff --git a/content/public/renderer/render_frame.h b/content/public/renderer/render_frame.h
index 814822517b3829be40f36ac13c9b59250ddc33ea..d284a989cd68f786b0ea8909b3c325809f38b08d 100644
--- a/content/public/renderer/render_frame.h
+++ b/content/public/renderer/render_frame.h
@@ -130,6 +130,36 @@ class CONTENT_EXPORT RenderFrame : public IPC::Listener,
   virtual void RegisterPeripheralPlugin(
       const url::Origin& content_origin,
       const base::Closure& unthrottle_callback) = 0;
+
+  // Returns true if this plugin should have power saver enabled.
+  //
+  // Power Saver is enabled for plugin content that are cross-origin and
+  // heuristically determined to be not essential to the web page content.
+  //
+  // Plugin content is defined to be cross-origin when the plugin source's
+  // origin differs from the top level frame's origin. For example:
+  //  - Cross-origin:  a.com -> b.com/plugin.swf
+  //  - Cross-origin:  a.com -> b.com/iframe.html -> b.com/plugin.swf
+  //  - Same-origin:   a.com -> b.com/iframe-to-a.html -> a.com/plugin.swf
+  //
+  // |main_frame_origin| is the origin of the main frame.
+  //
+  // |content_origin| is the origin of the plugin content.
+  //
+  // |width| and |height| are zoom and device scale independent logical pixels.
+  //
+  // |cross_origin_main_content| may be NULL. It is set to true if the
+  // plugin content is cross-origin but still the "main attraction" of the page.
+  virtual bool ShouldThrottleContent(const url::Origin& main_frame_origin,
+                                     const url::Origin& content_origin,
+                                     const std::string& plugin_module_name,
+                                     int width,
+                                     int height,
+                                     bool* cross_origin_main_content) const = 0;
+
+  // Whitelists a |content_origin| so its content will never be throttled in
+  // this RenderFrame. Whitelist is cleared by top level navigation.
+  virtual void WhitelistContentOrigin(const url::Origin& content_origin) = 0;
 #endif
 
   // Returns true if this frame is a FTP directory listing.