<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..c83d1a11a850dac30e8952f46165be2f0b7cbf76 100644
--- a/content/renderer/browser_plugin/browser_plugin.h
+++ b/content/renderer/browser_plugin/browser_plugin.h
@@ -118,6 +118,12 @@ 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,
+                            const std::string& type,
+                            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 +132,9 @@ 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 OnEmbedderDecidedPermission(int request_id, bool allow);
+
 
   // WebKit::WebPlugin implementation.
   virtual WebKit::WebPluginContainer* container() const OVERRIDE;
@@ -174,6 +183,11 @@ class CONTENT_EXPORT BrowserPlugin :
   // For unit/integration tests.
   friend class MockBrowserPlugin;
 
+  enum PermissionRequestType {
+    INVALID = -1,
+    MEDIA
+  };
+
   // A BrowserPlugin object is a controller that represents an instance of a
   // browser plugin within the embedder renderer process. Each BrowserPlugin
   // within a process has a unique instance_id that is used to route messages
@@ -243,6 +257,8 @@ 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 +303,24 @@ class CONTENT_EXPORT BrowserPlugin :
   void OnUpdatedName(int instance_id, const std::string& name);
   void OnUpdateRect(int instance_id,
                     const BrowserPluginMsg_UpdateRect_Params& params);
+  // Requests permission from the embedder.
+  void OnRequestPermission(int instance_id,
+                           const std::string& permission_type,
+                           int request_id,
+                           const base::DictionaryValue& request_info);
+  // Requests media access permission from the embedder.
+  void OnRequestMediaPermission(int request_id,
+                                const base::DictionaryValue& request_info);
+  // Informs the BrowserPlugin that the guest's permission request has been
+  // allowed or denied by the embedder.
+  void RespondPermission(PermissionRequestType type,
+                         int request_id,
+                         bool allow);
+
+  void RespondPermissionIfPending(int request_id, bool allow);
+  void OnRequestObjectGarbageCollected(int request_id);
+  static void WeakCallbackForPersistObject(v8::Persistent<v8::Value> object,
+                                           void* param);
 
   int instance_id_;
   base::WeakPtr<RenderViewImpl> render_view_;
@@ -326,6 +360,16 @@ class CONTENT_EXPORT BrowserPlugin :
   bool size_changed_in_flight_;
   bool allocate_instance_id_sent_;
 
+  std::map<int, PermissionRequestType> pending_request_id_to_type_;
+
+  typedef std::set<int> PendingPermissionRequestIds;
+  PendingPermissionRequestIds pending_permission_request_ids_;
+
+  typedef std::pair<int, base::WeakPtr<BrowserPlugin> >
+      AliveV8PermissionRequestItem;
+  std::map<int, AliveV8PermissionRequestItem*>
+      alive_v8_permission_request_objects;
+
   // BrowserPlugin outlives RenderViewImpl in Chrome Apps and so we need to
   // store the BrowserPlugin's BrowserPluginManager in a member variable to
   // avoid accessing the RenderViewImpl.
@@ -348,6 +392,10 @@ class CONTENT_EXPORT BrowserPlugin :
   bool compositing_enabled_;
   scoped_refptr<BrowserPluginCompositingHelper> compositing_helper_;
 
+  // Weak factory used in v8 |MakeWeak| callback, since the v8 callback might
+  // get called after BrowserPlugin has been destroyed.
+  base::WeakPtrFactory<BrowserPlugin> weak_ptr_factory_;
+
   DISALLOW_COPY_AND_ASSIGN(BrowserPlugin);
 };