Check media permissions through RenderFrameHostDelegate.

content/browser/web_contents/web_contents_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.
 
 #include "content/browser/web_contents/web_contents_impl.h"
 
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
@@ skipping 1733 matching lines @@
     const MediaResponseCallback& callback) {
   if (delegate_) {
     delegate_->RequestMediaAccessPermission(this, request, callback);
   } else {
     callback.Run(MediaStreamDevices(),
                  MEDIA_DEVICE_INVALID_STATE,
                  scoped_ptr<MediaStreamUI>());
   }
 }
 
+bool WebContentsImpl::CheckMediaAccessPermission(const GURL& security_origin,
+                                                 MediaStreamType type) {
+  DCHECK(type == MEDIA_DEVICE_AUDIO_CAPTURE ||
+         type == MEDIA_DEVICE_VIDEO_CAPTURE);
+  if (delegate_)
+    return delegate_->CheckMediaAccessPermission(this, security_origin, type);
+  else

[sky, 2014/09/12 16:19:14]

nit: no else here, or you can make a single return for the whole function, eg:
return delegate_ && delegate->CheckM...

[Henrik Grunell, 2014/09/15 11:33:47]

Done.

+    return false;
+}
+
 SessionStorageNamespace* WebContentsImpl::GetSessionStorageNamespace(
     SiteInstance* instance) {
   return controller_.GetSessionStorageNamespace(instance);
 }
 
 SessionStorageNamespaceMap WebContentsImpl::GetSessionStorageNamespaceMap() {
   return controller_.GetSessionStorageNamespaceMap();
 }
 
 FrameTree* WebContentsImpl::GetFrameTree() {
@@ skipping 2482 matching lines @@
   node->render_manager()->ResumeResponseDeferredAtStart();
 }
 
 void WebContentsImpl::SetForceDisableOverscrollContent(bool force_disable) {
   force_disable_overscroll_content_ = force_disable;
   if (view_)
     view_->SetOverscrollControllerEnabled(CanOverscrollContent());
 }
 
 }  // namespace content