Switch ChromeTestSuite to the same convention as ContentTestSuite:

chrome/browser/extensions/external_policy_extension_loader_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 <string>
 
 #include "base/logging.h"
 #include "base/message_loop.h"
 #include "base/values.h"
 #include "base/version.h"
 #include "chrome/browser/extensions/external_extension_provider_interface.h"
 #include "chrome/browser/extensions/external_extension_provider_impl.h"
 #include "chrome/browser/extensions/external_policy_extension_loader.h"
 #include "chrome/common/extensions/extension.h"
 #include "chrome/common/pref_names.h"
-#include "chrome/test/base/testing_browser_process_test.h"
 #include "chrome/test/base/testing_pref_service.h"
 #include "chrome/test/base/testing_profile.h"
 #include "content/browser/browser_thread.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
-class ExternalPolicyExtensionProviderTest : public TestingBrowserProcessTest {
+class ExternalPolicyExtensionProviderTest : public testing::Test {
  public:
   ExternalPolicyExtensionProviderTest()
       : loop_(MessageLoop::TYPE_IO),
         ui_thread_(BrowserThread::UI, &loop_) {
   }
 
   virtual ~ExternalPolicyExtensionProviderTest() {}
 
  private:
   // We need these to satisfy BrowserThread::CurrentlyOn(BrowserThread::UI)
@@ skipping 104 matching lines @@
       "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa;http#//www.example.com/crx"));
   forced_extensions.Append(Value::CreateStringValue(
       "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"));
   forced_extensions.Append(Value::CreateStringValue(
       "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaahttp#//www.example.com/crx"));
 
   MockExternalPolicyExtensionProviderVisitor mv;
   std::set<std::string> empty;
   mv.Visit(&forced_extensions, &valid_extensions, empty);
 }