Use base::MessageLoop in more files.

content/browser/renderer_host/smooth_scroll_gesture_controller_unittest.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 "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/time.h"
 #include "content/browser/renderer_host/render_widget_host_delegate.h"
 #include "content/browser/renderer_host/smooth_scroll_gesture_controller.h"
 #include "content/browser/renderer_host/test_render_view_host.h"
@@ skipping 105 matching lines @@
     delegate_.reset();
     process_ = NULL;
     browser_context_.reset();
 
 #if defined(USE_AURA)
     aura::Env::DeleteInstance();
     screen_.reset();
 #endif
 
     // Process all pending tasks to avoid leaks.
-    MessageLoop::current()->RunUntilIdle();
+    base::MessageLoop::current()->RunUntilIdle();
   }
 
   void PostQuitMessageAndRun() {
     // Allow the message loop to process pending synthetic scrolls, then quit.
-    MessageLoop::current()->PostDelayedTask(
-        FROM_HERE, MessageLoop::QuitClosure(),
+    base::MessageLoop::current()->PostDelayedTask(
+        FROM_HERE, base::MessageLoop::QuitClosure(),
         TimeDelta::FromMilliseconds(
             controller_.GetSyntheticScrollMessageInterval().InMilliseconds() *
             3));
-    MessageLoop::current()->Run();
+    base::MessageLoop::current()->Run();
   }
 
-  MessageLoopForUI message_loop_;
+  base::MessageLoopForUI message_loop_;
 
   scoped_ptr<TestBrowserContext> browser_context_;
   MockRenderProcessHost* process_;  // Deleted automatically by the widget.
   scoped_ptr<MockRenderWidgetHostDelegate> delegate_;
   scoped_ptr<MockRenderWidgetHost> host_;
   scoped_ptr<TestView> view_;
 #if defined(USE_AURA)
   scoped_ptr<gfx::Screen> screen_;
 #endif
 
@@ skipping 24 matching lines @@
   EXPECT_EQ(original_gesture, view_->mock_gesture_);
 
   // Ensure the smooth scroll is ticked.
   PostQuitMessageAndRun();
   EXPECT_LT(current_ticks, view_->mock_gesture_->called_);
 }
 
 }  // namespace
 
 }  // namespace content