<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 20 matching lines @@
 
 #include <map>
 
 #include "base/compiler_specific.h"
 #include "base/id_map.h"
 #include "base/time.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "content/public/browser/web_contents_delegate.h"
 #include "content/public/browser/web_contents_observer.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebDragOperation.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebDragStatus.h"
-#include "third_party/WebKit/Source/WebKit/chromium/public/WebDragOperation.h"
 #include "ui/gfx/rect.h"
 #include "ui/surface/transport_dib.h"
 
 struct BrowserPluginHostMsg_AutoSize_Params;
 struct BrowserPluginHostMsg_CreateGuest_Params;
 struct BrowserPluginHostMsg_ResizeGuest_Params;
 struct ViewHostMsg_UpdateRect_Params;
 class WebCursor;
 struct WebDropData;
 
 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 60 matching lines @@
   // 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 RendererResponsive(WebContents* source) OVERRIDE;
   virtual void RunFileChooser(WebContents* web_contents,
                               const FileChooserParams& params) OVERRIDE;
   virtual bool ShouldFocusPageAfterCrash() 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 BrowserPluginHostMsg_AutoSize_Params& auto_size_params,
       const BrowserPluginHostMsg_ResizeGuest_Params& resize_guest_params);
   // Overrides default ShowWidget message so we show them on the correct
   // coordinates.
   void ShowWidget(RenderViewHost* render_view_host,
@@ skipping 49 matching lines @@
   // Exposes the protected web_contents() from WebContentsObserver.
   WebContents* GetWebContents();
 
   // Kill the guest process.
   void Terminate();
 
   // Grab the new damage buffer from the embedder, and resize the guest's
   // web contents.
   void Resize(RenderViewHost* embedder_rvh,
               const BrowserPluginHostMsg_ResizeGuest_Params& params);
+  // Allows or denies a media access request, after the embedder has had a
+  // chance to decide.
+  void AllowMediaAccess(WebContents* embedder_web_contents,
+                        int request_id,
+                        bool should_allow);
 
   // Overridden in tests.
   // Handles input event routed through the embedder (which is initiated in the
   // browser plugin (renderer side of the embedder)).
   virtual void HandleInputEvent(RenderViewHost* render_view_host,
                                 const gfx::Rect& guest_window_rect,
                                 const gfx::Rect& guest_screen_rect,
                                 const WebKit::WebInputEvent& event);
   virtual bool ViewTakeFocus(bool reverse);
   // If possible, navigate the guest to |relative_index| entries away from the
@@ skipping 17 matching lines @@
   virtual void SetCompositingBufferData(int gpu_process_id,
                                         uint32 client_id,
                                         uint32 context_id,
                                         uint32 texture_id_0,
                                         uint32 texture_id_1,
                                         uint32 sync_point);
 
   gfx::Point GetScreenCoordinates(const gfx::Point& relative_position) const;
 
  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,
                      const BrowserPluginHostMsg_CreateGuest_Params& params);
 
   // Returns the identifier that uniquely identifies a browser plugin guest
   // within an embedder.
   int instance_id() const { return instance_id_; }
   TransportDIB* damage_buffer() const { return damage_buffer_.get(); }
@@ skipping 37 matching lines @@
   gfx::Rect guest_window_rect_;
   gfx::Rect guest_screen_rect_;
   IDMap<RenderViewHost> pending_updates_;
   int pending_update_counter_;
   base::TimeDelta guest_hang_timeout_;
   bool focused_;
   bool visible_;
   bool auto_size_enabled_;
   gfx::Size max_auto_size_;
   gfx::Size min_auto_size_;
+  // A counter to generate unique request id for a media access request.
+  // We only need the ids to be unique for a given BrowserPluginGuest.
+  int current_media_access_request_id_;
+  // 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_;
 
   // Hardware Accelerated Surface Params
   gfx::GLSurfaceHandle surface_handle_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserPluginGuest);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_BROWSER_PLUGIN_BROWSER_PLUGIN_GUEST_H_