[content/browser/media] Replace MessageLoopProxy usage with ThreadTaskRunnerHandle

content/browser/media/capture/web_contents_tracker.cc

 // Copyright (c) 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/media/capture/web_contents_tracker.h"
 
-#include "base/message_loop/message_loop_proxy.h"
+#include "base/thread_task_runner_handle.h"
 #include "content/browser/frame_host/render_frame_host_impl.h"
 #include "content/browser/renderer_host/render_widget_host_impl.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/render_widget_host_view.h"
 #include "content/public/browser/web_contents.h"
 
 namespace content {
 
 WebContentsTracker::WebContentsTracker(bool track_fullscreen_rwh)
     : track_fullscreen_rwh_(track_fullscreen_rwh),
       last_target_(NULL) {}
 
 WebContentsTracker::~WebContentsTracker() {
   DCHECK(!web_contents()) << "BUG: Still observering!";
 }
 
 void WebContentsTracker::Start(int render_process_id, int main_render_frame_id,
                                const ChangeCallback& callback) {
-  DCHECK(!message_loop_.get() || message_loop_->BelongsToCurrentThread());
+  DCHECK(!task_runner_.get() || task_runner_->BelongsToCurrentThread());
 
-  message_loop_ = base::MessageLoopProxy::current();
-  DCHECK(message_loop_.get());
+  task_runner_ = base::ThreadTaskRunnerHandle::Get();
+  DCHECK(task_runner_.get());
   callback_ = callback;
 
   if (BrowserThread::CurrentlyOn(BrowserThread::UI)) {
     StartObservingWebContents(render_process_id, main_render_frame_id);
   } else {
     BrowserThread::PostTask(
         BrowserThread::UI, FROM_HERE,
         base::Bind(&WebContentsTracker::StartObservingWebContents, this,
                    render_process_id, main_render_frame_id));
   }
 }
 
 void WebContentsTracker::Stop() {
-  DCHECK(message_loop_->BelongsToCurrentThread());
+  DCHECK(task_runner_->BelongsToCurrentThread());
 
   callback_.Reset();
 
   if (BrowserThread::CurrentlyOn(BrowserThread::UI)) {
     WebContentsObserver::Observe(NULL);
   } else {
     BrowserThread::PostTask(
         BrowserThread::UI, FROM_HERE,
         base::Bind(&WebContentsTracker::Observe, this,
                    static_cast<WebContents*>(NULL)));
@@ skipping 26 matching lines @@
 void WebContentsTracker::OnPossibleTargetChange(bool force_callback_run) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 
   RenderWidgetHost* const rwh = GetTargetRenderWidgetHost();
   if (rwh == last_target_ && !force_callback_run)
     return;
   DVLOG(1) << "Will report target change from RenderWidgetHost@" << last_target_
            << " to RenderWidgetHost@" << rwh;
   last_target_ = rwh;
 
-  if (message_loop_->BelongsToCurrentThread()) {
+  if (task_runner_->BelongsToCurrentThread()) {
     MaybeDoCallback(rwh);
   } else {
-    message_loop_->PostTask(
+    task_runner_->PostTask(
         FROM_HERE,
         base::Bind(&WebContentsTracker::MaybeDoCallback, this, rwh));
   }
 }
 
 void WebContentsTracker::MaybeDoCallback(RenderWidgetHost* rwh) {
-  DCHECK(message_loop_->BelongsToCurrentThread());
+  DCHECK(task_runner_->BelongsToCurrentThread());
 
   if (!callback_.is_null())
     callback_.Run(rwh);
 }
 
 void WebContentsTracker::StartObservingWebContents(int render_process_id,
                                                    int main_render_frame_id) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 
   Observe(WebContents::FromRenderFrameHost(RenderFrameHost::FromID(
@@ skipping 23 matching lines @@
 
 void WebContentsTracker::DidShowFullscreenWidget(int routing_id) {
   OnPossibleTargetChange(false);
 }
 
 void WebContentsTracker::DidDestroyFullscreenWidget(int routing_id) {
   OnPossibleTargetChange(false);
 }
 
 }  // namespace content