Move scoped_temp_dir from base to base/files

chrome/browser/thumbnails/thumbnail_service_unittest.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 "chrome/browser/thumbnails/thumbnail_service_impl.h"
 
 #include "base/memory/ref_counted.h"
 #include "chrome/test/base/testing_profile.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ skipping 58 matching lines @@
   scoped_refptr<MockTopSites> mock_top_sites_;
 
   DISALLOW_COPY_AND_ASSIGN(MockProfile);
 };
 
 TEST_F(ThumbnailServiceTest, ShouldUpdateThumbnail) {
   const GURL kGoodURL("http://www.google.com/");
   const GURL kBadURL("chrome://newtab");
 
   // Set up the mock profile along with mock top sites.
-  ScopedTempDir temp_dir;
+  base::ScopedTempDir temp_dir;
   ASSERT_TRUE(temp_dir.CreateUniqueTempDir());
   MockProfile profile;
 
   scoped_refptr<thumbnails::ThumbnailService> thumbnail_service(
       new thumbnails::ThumbnailServiceImpl(&profile));
 
   // Should be false because it's a bad URL.
   EXPECT_FALSE(thumbnail_service->ShouldAcquirePageThumbnail(kBadURL));
 
   // Should be true, as it's a good URL.
@@ skipping 22 matching lines @@
   good_score.at_top = true;
   good_score.good_clipping = true;
   good_score.boring_score = 0.0;
   good_score.load_completed = true;
   profile.AddKnownURL(kGoodURL, good_score);
 
   // Should be false, as the existing thumbnail is good enough (i.e. don't
   // need to replace the existing thumbnail which is new and good).
   EXPECT_FALSE(thumbnail_service->ShouldAcquirePageThumbnail(kGoodURL));
 }