<webview>: First stab at implementing media permission request for guests.

content/renderer/browser_plugin/browser_plugin.h

Index: content/renderer/browser_plugin/browser_plugin.h
diff --git a/content/renderer/browser_plugin/browser_plugin.h b/content/renderer/browser_plugin/browser_plugin.h
index 571804f1cee724e54b728a7380aea0b3a07dbf3f..836871517bc7596fce2c35469c0207b29ee74897 100644
--- a/content/renderer/browser_plugin/browser_plugin.h
+++ b/content/renderer/browser_plugin/browser_plugin.h
@@ -121,6 +121,9 @@ class CONTENT_EXPORT BrowserPlugin :
   bool InBounds(const gfx::Point& point) const;
 
   gfx::Point ToLocalCoordinates(const gfx::Point& point) const;
+  // Called by browser plugin binding.
+  void OnListenerCallMediaAccess(int request_id, bool allow);
+
 
   // WebKit::WebPlugin implementation.
   virtual WebKit::WebPluginContainer* container() const OVERRIDE;
@@ -238,6 +241,8 @@ class CONTENT_EXPORT BrowserPlugin :
   // Informs the BrowserPlugin that guest has changed its size in autosize mode.
   void SizeChangedDueToAutoSize(const gfx::Size& old_view_size);
 
+  bool HasEventListeners(const std::string& event_name);
+
   // Indicates whether a damage buffer was used by the guest process for the
   // provided |params|.
   static bool UsesDamageBuffer(
@@ -282,6 +287,14 @@ class CONTENT_EXPORT BrowserPlugin :
   void OnUpdatedName(int instance_id, const std::string& name);
   void OnUpdateRect(int instance_id,
                     const BrowserPluginMsg_UpdateRect_Params& params);
+  // Requests media access permission from the embedder.
+  void OnRequestMediaAccess(int instance_id,
+                            int request_id,
+                            const GURL& security_origin);
+  // Informs the BrowserPlugin that the guest's request for media access has
+  // been allowed or denied by the embedder.
+  void RespondMediaAccess(int request_id, bool allow);
+
 
   int instance_id_;
   base::WeakPtr<RenderViewImpl> render_view_;
@@ -320,6 +333,8 @@ class CONTENT_EXPORT BrowserPlugin :
   gfx::Size last_view_size_;
   bool size_changed_in_flight_;
   bool allocate_instance_id_sent_;
+  typedef std::set<int> MediaAccessPendingRequestIds;
+  MediaAccessPendingRequestIds media_access_pending_request_ids_;
 
   // BrowserPlugin outlives RenderViewImpl in Chrome Apps and so we need to
   // store the BrowserPlugin's BrowserPluginManager in a member variable to