Audio notification plumbed from guest WebContents up to embedder.

content/browser/browser_plugin/browser_plugin_embedder.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 BrowserPluginEmbedder handles messages coming from a BrowserPlugin's
 // embedder that are not directed at any particular existing guest process.
 // In the beginning, when a BrowserPlugin instance in the embedder renderer
 // process requests an initial navigation, the WebContents for that renderer
 // renderer creates a BrowserPluginEmbedder for itself. The
 // BrowserPluginEmbedder, in turn, forwards the requests to a
@@ skipping 65 matching lines @@
   bool Find(int request_id,
             const base::string16& search_text,
             const blink::WebFindOptions& options);
   bool StopFinding(StopFindAction action);
 
   // Returns the "full page" guest if there is one. That is, if there is a
   // single BrowserPlugin in the embedder which takes up the full page, then it
   // is returned.
   BrowserPluginGuest* GetFullPageGuest();
 
+  // Polls all guests for this web contents and returns true if any of them
+  // were audible recently.
+  bool WereAnyGuestsRecentlyAudible();
+
  private:
   explicit BrowserPluginEmbedder(WebContentsImpl* web_contents);
 
   BrowserPluginGuestManager* GetBrowserPluginGuestManager() const;
 
   void ClearGuestDragStateIfApplicable();
 
   static bool DidSendScreenRectsCallback(WebContents* guest_web_contents);
 
   // Notifies a guest that the embedder's screen info has changed.
   static bool NotifyScreenInfoChanged(WebContents* guest_web_contents);
 
   // Closes modal dialogs in |guest_web_contents|.
   static bool CancelDialogs(WebContents* guest_web_contents);
 
   static bool UnlockMouseIfNecessaryCallback(bool* mouse_unlocked,
                                              WebContents* guest);
 
   static bool FindInGuest(int request_id,
                           const base::string16& search_text,
                           const blink::WebFindOptions& options,
                           WebContents* guest);
   static bool StopFindingInGuest(StopFindAction action, WebContents* guest);
 
+  static bool GuestRecentlyAudibleCallback(WebContents* guest);
+
   // Message handlers.
 
   void OnAttach(RenderFrameHost* render_frame_host,
                 int instance_id,
                 const BrowserPluginHostMsg_Attach_Params& params);
   void OnUpdateDragCursor(bool* handled);
 
   // Used to correctly update the cursor when dragging over a guest, and to
   // handle a race condition when dropping onto the guest that started the drag
   // (the race is that the dragend message arrives before the drop message so
   // the drop never takes place).
   // crbug.com/233571
   base::WeakPtr<BrowserPluginGuest> guest_dragging_over_;
 
   // Pointer to the guest that started the drag, used to forward necessary drag
   // status messages to the correct guest.
   base::WeakPtr<BrowserPluginGuest> guest_started_drag_;
 
   // Keeps track of "dragend" state.
   bool guest_drag_ending_;
 
   base::WeakPtrFactory<BrowserPluginEmbedder> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserPluginEmbedder);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_BROWSER_PLUGIN_BROWSER_PLUGIN_EMBEDDER_H_