Switch content tests to use BrowserThreadImpl directly.

content/browser/in_process_webkit/dom_storage_unittest.cc

 // Copyright (c) 2011 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/file_path.h"
 #include "base/file_util.h"
+#include "content/browser/browser_thread_impl.h"
 #include "content/browser/in_process_webkit/webkit_context.h"
 #include "content/test/test_browser_context.h"
-#include "content/test/test_browser_thread.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "webkit/quota/mock_special_storage_policy.h"
 
+using content::BrowserThreadImpl;
+
 class DOMStorageTest : public testing::Test {
  public:
   DOMStorageTest()
       : message_loop_(MessageLoop::TYPE_IO),
         webkit_thread_(BrowserThread::WEBKIT, &message_loop_) {
   }
 
  protected:
   MessageLoop message_loop_;
 
  private:
-  content::TestBrowserThread webkit_thread_;
+  BrowserThreadImpl webkit_thread_;
 };
 
 TEST_F(DOMStorageTest, SessionOnly) {
   GURL session_only_origin("http://www.sessiononly.com");
   scoped_refptr<quota::MockSpecialStoragePolicy> special_storage_policy =
       new quota::MockSpecialStoragePolicy;
   special_storage_policy->AddSessionOnly(session_only_origin);
 
   // A scope for deleting TestBrowserContext early enough.
   {
@@ skipping 29 matching lines @@
     browser_context.GetWebKitContext()->DeleteSessionOnlyData();
 
     // Expected result: the database file for the permanent storage remains but
     // the database for the session only storage was deleted.
     EXPECT_FALSE(file_util::PathExists(session_only_database_path));
     EXPECT_TRUE(file_util::PathExists(permanent_database_path));
   }
   // Run the message loop to ensure that DOMStorageContext gets destroyed.
   message_loop_.RunAllPending();
 }