Align base::hash_map with C++11.

content/public/browser/browser_context.h

 // 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.
 
 #ifndef CONTENT_PUBLIC_BROWSER_BROWSER_CONTEXT_H_
 #define CONTENT_PUBLIC_BROWSER_BROWSER_CONTEXT_H_
 
 #include "base/callback_forward.h"
 #include "base/containers/hash_tables.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 150 matching lines @@
   // return NULL.
   virtual PushMessagingService* GetPushMessagingService() = 0;
 
   // Returns the SSL host state decisions for this context. The context may
   // return NULL, implementing the default exception storage strategy.
   virtual SSLHostStateDelegate* GetSSLHostStateDelegate() = 0;
 };
 
 }  // namespace content
 
-#if defined(COMPILER_GCC)
-namespace BASE_HASH_NAMESPACE {
-
-template<>
-struct hash<content::BrowserContext*> {
-  std::size_t operator()(content::BrowserContext* const& p) const {
-    return reinterpret_cast<std::size_t>(p);
-  }
-};
-
-}  // namespace BASE_HASH_NAMESPACE
-#endif
-
 #endif  // CONTENT_PUBLIC_BROWSER_BROWSER_CONTEXT_H_