Implement a salt for MediaSource IDs that can be cleared by a user.

content/browser/renderer_host/render_process_host_impl.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.
 
 // Represents the browser side of the browser <--> renderer communication
 // channel. There will be one RenderProcessHost per renderer process.
 
 #include "content/browser/renderer_host/render_process_host_impl.h"
 
 #include <algorithm>
@@ skipping 615 matching lines @@
         GetID(), browser_context->GetGeolocationPermissionContext()));
   }
   gpu_message_filter_ = new GpuMessageFilter(GetID(), widget_helper_.get());
   AddFilter(gpu_message_filter_);
 #if defined(ENABLE_WEBRTC)
   AddFilter(new WebRTCIdentityServiceHost(
       GetID(), storage_partition_impl_->GetWebRTCIdentityStore()));
   peer_connection_tracker_host_ = new PeerConnectionTrackerHost(GetID());
   AddFilter(peer_connection_tracker_host_.get());
   AddFilter(new MediaStreamDispatcherHost(
-      GetID(), media_stream_manager));
+      GetID(), browser_context, media_stream_manager));
   AddFilter(
       new DeviceRequestMessageFilter(resource_context, media_stream_manager));
 #endif
 #if defined(ENABLE_PLUGINS)
   AddFilter(new PepperRendererConnection(GetID()));
 #endif
 #if defined(ENABLE_INPUT_SPEECH)
   AddFilter(new InputTagSpeechDispatcherHost(
       IsGuest(), GetID(), storage_partition_impl_->GetURLRequestContext()));
 #endif
@@ skipping 1179 matching lines @@
     // Skip widgets in other processes.
     if (widget->GetProcess()->GetID() != GetID())
       continue;
 
     RenderViewHost* rvh = RenderViewHost::From(widget);
     rvh->UpdateWebkitPreferences(rvh->GetWebkitPreferences());
   }
 }
 
 }  // namespace content