Make default media device ID salts random by default

content/browser/renderer_host/media/media_stream_dispatcher_host_unittest.cc

 // 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.
 
 #include "content/browser/renderer_host/media/media_stream_dispatcher_host.h"
 
 #include <stddef.h>
 #include <queue>
 #include <string>
 #include <utility>
@@ skipping 45 matching lines @@
 const int kProcessId = 5;
 const int kRenderId = 6;
 const int kPageRequestId = 7;
 
 namespace content {
 
 class MockMediaStreamDispatcherHost : public MediaStreamDispatcherHost,
                                       public TestContentBrowserClient {
  public:
   MockMediaStreamDispatcherHost(
-      const ResourceContext::SaltCallback salt_callback,
+      const std::string& salt,
       const scoped_refptr<base::SingleThreadTaskRunner>& task_runner,
       MediaStreamManager* manager)
-      : MediaStreamDispatcherHost(kProcessId, salt_callback, manager, true),
+      : MediaStreamDispatcherHost(kProcessId, salt, manager, true),
         task_runner_(task_runner),
         current_ipc_(NULL) {}
 
   // A list of mock methods.
   MOCK_METHOD4(OnStreamGenerated,
                void(int routing_id, int request_id, int audio_array_size,
                     int video_array_size));
   MOCK_METHOD3(OnStreamGenerationFailed, void(int routing_id,
                                               int request_id,
                                               MediaStreamRequestResult result));
@@ skipping 874 matching lines @@
 
 TEST_F(MediaStreamDispatcherHostTest, DeviceChangeNotification) {
   SetupFakeUI(false);
   // warm up the cache
   EnumerateDevicesAndWaitForResult(kRenderId, kPageRequestId,
                                    MEDIA_DEVICE_VIDEO_CAPTURE);
   SubscribeToDeviceChangeNotificationsAndWaitForNotification(kRenderId);
 }
 
 };  // namespace content