Cleanup in ios/chrome and ios/public/test.

ios/public/test/test_chrome_provider_initializer.cc

 // Copyright 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 "ios/public/test/test_chrome_provider_initializer.h"
 
 #include "ios/public/test/test_chrome_browser_provider.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace ios {
 
 TestChromeProviderInitializer::TestChromeProviderInitializer() {
-  chrome_browser_provider_ = new TestChromeBrowserProvider();
-  ios::SetChromeBrowserProvider(chrome_browser_provider_);
+  chrome_browser_provider_.reset(new TestChromeBrowserProvider());
+  ios::SetChromeBrowserProvider(chrome_browser_provider_.get());
 }
 
 TestChromeProviderInitializer::~TestChromeProviderInitializer() {
-  EXPECT_EQ(chrome_browser_provider_, ios::GetChromeBrowserProvider());
+  EXPECT_EQ(chrome_browser_provider_.get(), ios::GetChromeBrowserProvider());
   ios::SetChromeBrowserProvider(NULL);
-  delete chrome_browser_provider_;
 }
 
 }  // namespace ios