<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 3a1bf2ea1dfe5d4fe49d20f7a5ce7b4efa15b495..b6e8b4ae7b6d99848cae52a306c16f2a72c19dfb 100644
--- a/content/renderer/browser_plugin/browser_plugin.h
+++ b/content/renderer/browser_plugin/browser_plugin.h
@@ -125,6 +125,12 @@ class CONTENT_EXPORT BrowserPlugin :
   // touch events.
   void SetAcceptTouchEvents(bool accept);
 
+  // Requests media access permission from the embedder.
+  void RequestMediaAccess(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);
+
   // Tells the BrowserPlugin to tell the guest to navigate to the previous
   // navigation entry in the navigation history.
   void Back();
@@ -153,6 +159,9 @@ class CONTENT_EXPORT BrowserPlugin :
 
   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;
   virtual bool initialize(WebKit::WebPluginContainer* container) OVERRIDE;
@@ -191,6 +200,7 @@ class CONTENT_EXPORT BrowserPlugin :
       const WebKit::WebURL& url,
       void* notify_data,
       const WebKit::WebURLError& error) OVERRIDE;
+
  private:
   friend class base::DeleteHelper<BrowserPlugin>;
   // Only the manager is allowed to create a BrowserPlugin.
@@ -273,6 +283,9 @@ 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);
+  size_t GetNumberOfEventListeners(const std::string& event_name);
+
 #if defined(OS_MACOSX)
   bool DamageBufferMatches(const TransportDIB* damage_buffer,
                            const TransportDIB::Id& other_damage_buffer_id);
@@ -321,6 +334,8 @@ class CONTENT_EXPORT BrowserPlugin :
 
   gfx::Size last_view_size_;
   bool size_changed_in_flight_;
+  typedef std::map<int, size_t> MediaAccessPendingCountsMap;
+  MediaAccessPendingCountsMap media_access_pending_counts_;
 
   // BrowserPlugin outlives RenderViewImpl in Chrome Apps and so we need to
   // store the BrowserPlugin's BrowserPluginManager in a member variable to