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

content/public/renderer/render_frame.h

 // Copyright 2013 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 CONTENT_PUBLIC_RENDERER_RENDER_FRAME_H_
 #define CONTENT_PUBLIC_RENDERER_RENDER_FRAME_H_
 
 #include "base/callback_forward.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/strings/string16.h"
@@ skipping 112 matching lines @@
   // Returns the ServiceRegistry for this frame.
   virtual ServiceRegistry* GetServiceRegistry() = 0;
 
 #if defined(ENABLE_PLUGINS)
   // Registers a plugin that has been marked peripheral. If the origin
   // whitelist is later updated and includes |content_origin|, then
   // |unthrottle_callback| will be called.
   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.
   virtual bool IsFTPDirectoryListing() = 0;
 
   // Attaches the browser plugin identified by |element_instance_id| to guest
   // content created by the embedder.
   virtual void AttachGuest(int element_instance_id) = 0;
 
   // Detaches the browser plugin identified by |element_instance_id| from guest
@@ skipping 19 matching lines @@
 
  private:
   // This interface should only be implemented inside content.
   friend class RenderFrameImpl;
   RenderFrame() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_RENDERER_RENDER_FRAME_H_