Use base::MessageLoop in more files.

ui/snapshot/snapshot_aura_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 "ui/snapshot/snapshot.h"
 
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/aura/root_window.h"
 #include "ui/aura/test/aura_test_helper.h"
 #include "ui/aura/test/test_screen.h"
@@ skipping 48 matching lines @@
 
 }  // namespace
 
 class SnapshotAuraTest : public testing::Test {
  public:
   SnapshotAuraTest() {}
   virtual ~SnapshotAuraTest() {}
 
   virtual void SetUp() OVERRIDE {
     testing::Test::SetUp();
-    helper_.reset(new aura::test::AuraTestHelper(MessageLoopForUI::current()));
+    helper_.reset(
+        new aura::test::AuraTestHelper(base::MessageLoopForUI::current()));
     helper_->SetUp();
   }
 
   virtual void TearDown() OVERRIDE {
     test_window_.reset();
     delegate_.reset();
     helper_->RunAllPendingInMessageLoop();
     helper_->TearDown();
     testing::Test::TearDown();
   }
@@ skipping 133 matching lines @@
   gfx::SizeF snapshot_size(test_bounds.size());
   snapshot_size.Scale(2.0f / kUIScale);
 
   gfx::Image snapshot = GrabSnapshotForTestWindow();
   EXPECT_EQ(gfx::ToRoundedSize(snapshot_size).ToString(),
             snapshot.Size().ToString());
   EXPECT_EQ(0u, GetFailedPixelsCount(snapshot));
 }
 
 }  // namespace ui