Align base::hash_map with C++11.

chrome/browser/safe_browsing/protocol_manager.h

Index: chrome/browser/safe_browsing/protocol_manager.h
diff --git a/chrome/browser/safe_browsing/protocol_manager.h b/chrome/browser/safe_browsing/protocol_manager.h
index 91693ae9fbb1b01a8c2b9a703bf0fa2e25748c3c..47d20fedb3690a77bfcff1e94c29f031f165a6b0 100644
--- a/chrome/browser/safe_browsing/protocol_manager.h
+++ b/chrome/browser/safe_browsing/protocol_manager.h
@@ -36,19 +36,6 @@ class URLFetcher;
 class URLRequestContextGetter;
 }  // namespace net
 
-#if defined(COMPILER_GCC)
-// Allows us to use URLFetchers in a hash_map with gcc (MSVC is okay without
-// specifying this).
-namespace BASE_HASH_NAMESPACE {
-template<>
-struct hash<const net::URLFetcher*> {
-  size_t operator()(const net::URLFetcher* fetcher) const {
-    return reinterpret_cast<size_t>(fetcher);
-  }
-};
-}
-#endif
-
 class SBProtocolManagerFactory;
 class SafeBrowsingProtocolManagerDelegate;