favor DCHECK_CURRENTLY_ON for better logs in content/browser/[q-z]*

content/browser/renderer_host/media/media_stream_ui_proxy.cc

 // Copyright 2013 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_ui_proxy.h"
 
 #include "base/command_line.h"
 #include "content/browser/frame_host/frame_tree_node.h"
 #include "content/browser/frame_host/render_frame_host_delegate.h"
 #include "content/browser/frame_host/render_frame_host_impl.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/common/content_switches.h"
 #include "media/video/capture/fake_video_capture_device.h"
 
 namespace content {
 
 void SetAndCheckAncestorFlag(MediaStreamRequest* request) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
   RenderFrameHostImpl* rfh =
       RenderFrameHostImpl::FromID(request->render_process_id,
                                   request->render_frame_id);
 
   if (rfh == NULL) {
     // RenderFrame destroyed before the request is handled?
     return;
   }
   FrameTreeNode* node = rfh->frame_tree_node();
 
@@ skipping 342 matching lines @@
                  callback,
                  have_access));
   return;
 }
 
 void FakeMediaStreamUIProxy::OnStarted(
     const base::Closure& stop_callback,
     const WindowIdCallback& window_id_callback) {}
 
 }  // namespace content