<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 3e63f1179496355fd8433c0fee9b282653eb6214..14ea94980377ea2fb35fd82578198be17797745c 100644
--- a/content/renderer/browser_plugin/browser_plugin.h
+++ b/content/renderer/browser_plugin/browser_plugin.h
@@ -14,6 +14,7 @@
 #if defined(OS_WIN)
 #include "base/shared_memory.h"
 #endif
+#include "content/common/browser_plugin_message_enums.h"
 #include "content/renderer/browser_plugin/browser_plugin_backing_store.h"
 #include "content/renderer/browser_plugin/browser_plugin_bindings.h"
 #include "content/renderer/render_view_impl.h"
@@ -114,12 +115,18 @@ class CONTENT_EXPORT BrowserPlugin :
   // Tells the BrowserPlugin to terminate the guest process.
   void TerminateGuest();
 
-  // A request from Javascript has been made to stop the loading of the page.
+  // A request from JavaScript has been made to stop the loading of the page.
   void Stop();
-  // A request from Javascript has been made to reload the page.
+  // A request from JavaScript has been made to reload the page.
   void Reload();
   // A request to enable hardware compositing.
   void EnableCompositing(bool enable);
+  // A request from content client to track lifetime of a JavaScript object
+  // related to a permission request object.
+  // This is used to clean up hanging permission request objects.
+  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
@@ -128,6 +135,9 @@ 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;
@@ -245,6 +255,8 @@ 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(
@@ -259,6 +271,26 @@ class CONTENT_EXPORT BrowserPlugin :
   // browser process.
   void SetInstanceID(int instance_id);
 
+  // Requests media access permission from the embedder.
+  void RequestMediaPermission(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(BrowserPluginPermissionType permission_type,
+                         int request_id,
+                         bool allow);
+
+  // If the request with id |request_id| is pending then informs the
+  // BrowserPlugin that the guest's permission request has been allowed or
+  // denied by the embedder.
+  void RespondPermissionIfRequestIsPending(int request_id, bool allow);
+  // Cleans up pending permission request once the associated event.request
+  // object goes out of scope in JavaScript.
+  void OnRequestObjectGarbageCollected(int request_id);
+  // V8 garbage collection callback for |object|.
+  static void WeakCallbackForPersistObject(v8::Persistent<v8::Value> object,
+                                           void* param);
+
   // IPC message handlers.
   // Please keep in alphabetical order.
   void OnAdvanceFocus(int instance_id, bool reverse);
@@ -284,6 +316,11 @@ class CONTENT_EXPORT BrowserPlugin :
                       bool is_top_level);
   void OnLoadStart(int instance_id, const GURL& url, bool is_top_level);
   void OnLoadStop(int instance_id);
+  // Requests permission from the embedder.
+  void OnRequestPermission(int instance_id,
+                           BrowserPluginPermissionType permission_type,
+                           int request_id,
+                           const base::DictionaryValue& request_info);
   void OnSetCursor(int instance_id, const WebCursor& cursor);
   void OnShouldAcceptTouchEvents(int instance_id, bool accept);
   void OnUpdatedName(int instance_id, const std::string& name);
@@ -328,6 +365,17 @@ class CONTENT_EXPORT BrowserPlugin :
   bool size_changed_in_flight_;
   bool allocate_instance_id_sent_;
 
+  // Each permission request item in the map is a pair of request id and
+  // permission type.
+  typedef std::map<int, std::pair<int, BrowserPluginPermissionType> >
+      PendingPermissionRequests;
+  PendingPermissionRequests pending_permission_requests_;
+
+  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.
@@ -350,6 +398,10 @@ 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);
 };