<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 17dcdcf5b3b340dfa0b6c0d243371883e2b3d219..1bb8f9dcb111a9af6161c13e94726b2f64837177 100644
--- a/content/renderer/browser_plugin/browser_plugin.h
+++ b/content/renderer/browser_plugin/browser_plugin.h
@@ -118,6 +118,10 @@ class CONTENT_EXPORT BrowserPlugin :
   void Reload();
   // A request to enable hardware compositing.
   void EnableCompositing(bool enable);
+  // A request from shim to track lifetime of a js object related to media
+  // access request object.
+  // This is used to clean up hanging media requests.
+  void PersistRequestObject(const NPVariant* request, int id);
 
   // Returns true if |point| lies within the bounds of the plugin rectangle.
   // Not OK to use this function for making security-sensitive decision since it
@@ -126,6 +130,9 @@ 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;
@@ -243,6 +250,8 @@ 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(
@@ -287,6 +296,18 @@ 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);
+
+  void RespondMediaAccessIfPending(int request_id, bool allow);
+  void OnMediaRequestGarbageCollected(int request_id);
+  static void WeakCallbackForPersistObject(v8::Persistent<v8::Value> object,
+                                           void* param);
 
   int instance_id_;
   base::WeakPtr<RenderViewImpl> render_view_;
@@ -325,6 +346,12 @@ 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_;
+
+  typedef std::pair<int*, BrowserPlugin*> MediaAccessAliveV8RequestItem;
+  std::map<int, MediaAccessAliveV8RequestItem*>
+      media_access_alive_v8_request_objects_;
 
   // BrowserPlugin outlives RenderViewImpl in Chrome Apps and so we need to
   // store the BrowserPlugin's BrowserPluginManager in a member variable to