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

content/browser/browser_plugin/browser_plugin_guest.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // A BrowserPluginGuest represents the browser side of browser <--> renderer
 // communication. A BrowserPlugin (a WebPlugin) is on the renderer side of
 // browser <--> guest renderer communication. The 'guest' renderer is a
 // <browser> tag.
 //
 // BrowserPluginGuest lives on the UI thread of the browser process. It has a
@@ skipping 35 matching lines @@
 
 namespace WebKit {
 class WebInputEvent;
 }
 
 namespace content {
 
 class BrowserPluginHostFactory;
 class BrowserPluginEmbedder;
 class RenderProcessHost;
+struct MediaStreamRequest;
 
 // A browser plugin guest provides functionality for WebContents to operate in
 // the guest role and implements guest specific overrides for ViewHostMsg_*
 // messages.
 //
 // BrowserPluginEmbedder is responsible for creating and destroying a guest.
 class CONTENT_EXPORT BrowserPluginGuest : public NotificationObserver,
                                           public WebContentsDelegate,
                                           public WebContentsObserver {
  public:
@@ skipping 46 matching lines @@
       PageTransition transition_type,
       RenderViewHost* render_view_host) OVERRIDE;
   virtual void RenderViewGone(base::TerminationStatus status) OVERRIDE;
 
   // WebContentsDelegate implementation.
   virtual bool CanDownload(RenderViewHost* render_view_host,
                            int request_id,
                            const std::string& request_method) OVERRIDE;
   virtual bool HandleContextMenu(const ContextMenuParams& params) OVERRIDE;
   virtual void RendererUnresponsive(WebContents* source) OVERRIDE;
+  virtual void RequestMediaAccessPermission(
+      WebContents* web_contents,
+      const content::MediaStreamRequest* request,
+      const content::MediaResponseCallback& callback) OVERRIDE;
 
   void UpdateRect(RenderViewHost* render_view_host,
                   const ViewHostMsg_UpdateRect_Params& params);
   void UpdateRectACK(int message_id, const gfx::Size& size);
   // Handles input event routed through the embedder (which is initiated in the
   // browser plugin (renderer side of the embedder)).
   void HandleInputEvent(RenderViewHost* render_view_host,
                         const gfx::Rect& guest_rect,
                         const WebKit::WebInputEvent& event,
                         IPC::Message* reply_message);
@@ skipping 27 matching lines @@
   // See RenderThreadImpl::IdleHandler (executed when hidden) and
   // RenderThreadImpl::IdleHandlerInForegroundTab (executed when visible).
   void SetVisibility(bool embedder_visible, bool visible);
 
   // Exposes the protected web_contents() from WebContentsObserver.
   WebContents* GetWebContents();
 
   // Kill the guest process.
   void Terminate();
 
+  // Allows or denies media access request.

[Charlie Reis, 2012/10/17 06:18:45]

nit: Allows or denies a media access request, after the embedder has had a
chance to decide.

[lazyboy, 2012/10/17 09:09:53]

Done.

+  void AllowMediaAccess(WebContents* embedder_web_contents,
+                        int request_id,
+                        bool allow);

[Charlie Reis, 2012/10/17 06:18:45]

nit: should_allow

[lazyboy, 2012/10/17 09:09:53]

Done.

+
   // Overridden in tests.
   virtual bool ViewTakeFocus(bool reverse);
   // If possible, navigate the guest to |relative_index| entries away from the
   // current navigation entry.
   virtual void Go(int relative_index);
   // Overridden in tests.
   virtual void SetFocus(bool focused);
   // Reload the guest.
   virtual void Reload();
   // Stop loading the guest.
   virtual void Stop();
   // Overridden in tests.
   virtual void SetDamageBuffer(TransportDIB* damage_buffer,
 #if defined(OS_WIN)
                                int damage_buffer_size,
 #endif
                                const gfx::Size& damage_view_size,
                                float scale_factor);
 
  private:
+  typedef std::pair<content::MediaStreamRequest, content::MediaResponseCallback>
+      MediaStreamRequestAndCallbackPair;
+  typedef std::map<int, MediaStreamRequestAndCallbackPair>
+      MediaStreamRequestsMap;
+
   friend class TestBrowserPluginGuest;
 
   BrowserPluginGuest(int instance_id,
                      WebContentsImpl* web_contents,
                      RenderViewHost* render_view_host);
 
   RenderProcessHost* embedder_render_process_host() {
     return embedder_render_process_host_;
   }
   // Returns the identifier that uniquely identifies a browser plugin guest
@@ skipping 28 matching lines @@
 #endif
   gfx::Size damage_view_size_;
   float damage_buffer_scale_factor_;
   scoped_ptr<IPC::Message> pending_input_event_reply_;
   gfx::Rect guest_rect_;
   WebCursor cursor_;
   IDMap<RenderViewHost> pending_updates_;
   int pending_update_counter_;
   base::TimeDelta guest_hang_timeout_;
   bool visible_;
+  // A map to store WebContents's media request object and callback.
+  // We need to store these because we need a roundtrip to the embedder to know
+  // if we allow or disallow the request. The key of the map is unique only for
+  // a given BrowserPluginGuest.
+  MediaStreamRequestsMap media_requests_map_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserPluginGuest);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_BROWSER_PLUGIN_BROWSER_PLUGIN_GUEST_H_