Remove all remaining traces of MessageLoopProxy.

content/browser/renderer_host/render_widget_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.
 
 #include "content/browser/renderer_host/render_widget_host_impl.h"
 
 #include <math.h>
 
 #include <set>
 #include <tuple>
@@ skipping 1236 matching lines @@
 
 #if defined(OS_MACOSX)
   // MacOS version of underlying GrabViewSnapshot() blocks while
   // display/GPU are in a power-saving mode, so make sure display
   // does not go to sleep for the duration of reading a snapshot.
   if (pending_browser_snapshots_.empty()) {
     DCHECK(!power_save_blocker_);
     power_save_blocker_.reset(new device::PowerSaveBlocker(
         device::PowerSaveBlocker::kPowerSaveBlockPreventDisplaySleep,
         device::PowerSaveBlocker::kReasonOther, "GetSnapshot",
-        BrowserThread::GetMessageLoopProxyForThread(BrowserThread::UI),
-        BrowserThread::GetMessageLoopProxyForThread(BrowserThread::FILE)));
+        BrowserThread::GetTaskRunnerForThread(BrowserThread::UI),
+        BrowserThread::GetTaskRunnerForThread(BrowserThread::FILE)));
   }
 #endif
   pending_browser_snapshots_.insert(std::make_pair(id, callback));
   Send(new ViewMsg_ForceRedraw(GetRoutingID(), id));
 }
 
 const NativeWebKeyboardEvent*
     RenderWidgetHostImpl::GetLastKeyboardEvent() const {
   return input_router_->GetLastKeyboardEvent();
 }
@@ skipping 885 matching lines @@
   return delegate_ ? delegate_->GetRootBrowserAccessibilityManager() : NULL;
 }
 
 BrowserAccessibilityManager*
     RenderWidgetHostImpl::GetOrCreateRootBrowserAccessibilityManager() {
   return delegate_ ?
       delegate_->GetOrCreateRootBrowserAccessibilityManager() : NULL;
 }
 
 }  // namespace content