[webcrypto] Remove the mock implementation of WebCrypto.

content/public/renderer/content_renderer_client.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/public/renderer/content_renderer_client.h"
 
 namespace content {
 
 SkBitmap* ContentRendererClient::GetSadPluginBitmap() {
   return NULL;
@@ skipping 61 matching lines @@
 
 WebKit::WebThemeEngine* ContentRendererClient::OverrideThemeEngine() {
   return NULL;
 }
 
 WebKit::WebSpeechSynthesizer* ContentRendererClient::OverrideSpeechSynthesizer(
     WebKit::WebSpeechSynthesizerClient* client) {
   return NULL;
 }
 
-WebKit::WebCrypto* ContentRendererClient::OverrideWebCrypto() {
-  return NULL;
-}
-
 bool ContentRendererClient::RunIdleHandlerWhenWidgetsHidden() {
   return true;
 }
 
 bool ContentRendererClient::AllowPopup() {
   return false;
 }
 
 bool ContentRendererClient::HandleNavigation(
     WebKit::WebFrame* frame,
@@ skipping 93 matching lines @@
 bool ContentRendererClient::ShouldReportDetailedMessageForSource(
     const base::string16& source) const {
   return false;
 }
 
 bool ContentRendererClient::ShouldEnableSiteIsolationPolicy() const {
   return true;
 }
 
 }  // namespace content