remove implementation of obsolete WebKitPlatformSupport::prefetchHostName.

content/renderer/renderer_webkitplatformsupport_impl.cc

 // 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.
 
 #include "content/renderer/renderer_webkitplatformsupport_impl.h"
 
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/lazy_instance.h"
 #include "base/memory/shared_memory.h"
@@ skipping 303 matching lines @@
 bool RendererWebKitPlatformSupportImpl::isLinkVisited(
     unsigned long long link_hash) {
   return GetContentClient()->renderer()->IsLinkVisited(link_hash);
 }
 
 WebKit::WebMessagePortChannel*
 RendererWebKitPlatformSupportImpl::createMessagePortChannel() {
   return new WebMessagePortChannelImpl(child_thread_loop_.get());
 }
 
-void RendererWebKitPlatformSupportImpl::prefetchHostName(
-    const WebString& hostname) {
-  if (hostname.isEmpty())
-    return;
-
-  std::string hostname_utf8 = UTF16ToUTF8(hostname);
-  GetContentClient()->renderer()->PrefetchHostName(
-      hostname_utf8.data(), hostname_utf8.length());
-}
-
 WebKit::WebPrescientNetworking*
 RendererWebKitPlatformSupportImpl::prescientNetworking() {
   return GetContentClient()->renderer()->GetPrescientNetworking();
 }
 
 bool
 RendererWebKitPlatformSupportImpl::CheckPreparsedJsCachingEnabled() const {
   static bool checked = false;
   static bool result = false;
   if (!checked) {
@@ skipping 810 matching lines @@
     return;
   QuotaDispatcher::ThreadSpecificInstance(
       thread_safe_sender_.get(),
       quota_message_filter_.get())->QueryStorageUsageAndQuota(
           storage_partition,
           static_cast<quota::StorageType>(type),
           QuotaDispatcher::CreateWebStorageQuotaCallbacksWrapper(callbacks));
 }
 
 }  // namespace content