Create 2272 release branch for CEF3.

git-svn-id: https://chromiumembedded.googlecode.com/svn/branches/2272@1993 5089003a-bbd8-11dd-ad1f-f1f9622dbc98

libcef/browser/media_capture_devices_dispatcher.h

@@ -0,0 +1,67 @@
+// 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.
+
+#ifndef CEF_LIBCEF_BROWSER_MEDIA_CAPTURE_DEVICES_DISPATCHER_H_
+#define CEF_LIBCEF_BROWSER_MEDIA_CAPTURE_DEVICES_DISPATCHER_H_
+
+#include "base/callback.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/memory/singleton.h"
+#include "base/observer_list.h"
+#include "content/public/browser/media_observer.h"
+#include "content/public/common/media_stream_request.h"
+
+class PrefRegistrySimple;
+class PrefService;
+
+// This singleton is used to receive updates about media events from the content
+// layer. Based on chrome/browser/media/media_capture_devices_dispatcher.[h|cc].
+class CefMediaCaptureDevicesDispatcher : public content::MediaObserver {
+ public:
+  static CefMediaCaptureDevicesDispatcher* GetInstance();
+
+  // Registers the preferences related to Media Stream default devices.
+  static void RegisterPrefs(PrefRegistrySimple* registry);
+
+  // Helper to get the default devices which can be used by the media request,
+  // if the return list is empty, it means there is no available device on the
+  // OS. Called on the UI thread.
+  void GetDefaultDevices(PrefService* prefs,
+                         bool audio,
+                         bool video,
+                         content::MediaStreamDevices* devices);
+
+  // Helper for picking the device that was requested for an OpenDevice request.
+  // If the device requested is not available it will revert to using the first
+  // available one instead or will return an empty list if no devices of the
+  // requested kind are present. Called on the UI thread.
+  void GetRequestedDevice(const std::string& requested_device_id,
+                          bool audio,
+                          bool video,
+                          content::MediaStreamDevices* devices);
+
+  // Overridden from content::MediaObserver:
+  void OnAudioCaptureDevicesChanged() override;
+  void OnVideoCaptureDevicesChanged() override;
+  void OnMediaRequestStateChanged(
+      int render_process_id,
+      int render_frame_id,
+      int page_request_id,
+      const GURL& security_origin,
+      content::MediaStreamType stream_type,
+      content::MediaRequestState state) override;
+   void OnCreatingAudioStream(int render_process_id,
+                              int render_view_id) override;
+
+ private:
+  friend struct DefaultSingletonTraits<CefMediaCaptureDevicesDispatcher>;
+
+  CefMediaCaptureDevicesDispatcher();
+  ~CefMediaCaptureDevicesDispatcher() override;
+
+  const content::MediaStreamDevices& GetAudioCaptureDevices();
+  const content::MediaStreamDevices& GetVideoCaptureDevices();
+};
+
+#endif  // CEF_LIBCEF_BROWSER_MEDIA_CAPTURE_DEVICES_DISPATCHER_H_