Android WebView visited link highlighting implementation part 1

android_webview/renderer/aw_content_renderer_client.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 ANDROID_WEBVIEW_RENDERER_AW_CONTENT_RENDERER_CLIENT_H_
 #define ANDROID_WEBVIEW_RENDERER_AW_CONTENT_RENDERER_CLIENT_H_
 
 #include "content/public/renderer/content_renderer_client.h"
 
 #include "base/compiler_specific.h"
 #include "android_webview/renderer/aw_render_process_observer.h"
 
+namespace components {
+class VisitedLinkSlave;
+}  // namespace components
+
 namespace android_webview {
 
 class AwContentRendererClient : public content::ContentRendererClient {
  public:
   AwContentRendererClient();
   virtual ~AwContentRendererClient();
 
   // ContentRendererClient implementation.
   virtual void RenderThreadStarted() OVERRIDE;
   virtual void RenderViewCreated(content::RenderView* render_view) OVERRIDE;
   virtual std::string GetDefaultEncoding() OVERRIDE;
   virtual bool HasErrorPage(int http_status_code,
                             std::string* error_domain) OVERRIDE;
   virtual void GetNavigationErrorStrings(
       const WebKit::WebURLRequest& failed_request,
       const WebKit::WebURLError& error,
       std::string* error_html,
       string16* error_description) OVERRIDE;
   virtual unsigned long long VisitedLinkHash(const char* canonical_url,
                                              size_t length) OVERRIDE;
   virtual bool IsLinkVisited(unsigned long long link_hash) OVERRIDE;
   virtual void PrefetchHostName(const char* hostname, size_t length) OVERRIDE;
 
  private:
   scoped_ptr<AwRenderProcessObserver> aw_render_process_observer_;
+  scoped_ptr<components::VisitedLinkSlave> visited_link_slave_;
 };
 
 }  // namespace android_webview
 
 #endif  // ANDROID_WEBVIEW_RENDERER_AW_CONTENT_RENDERER_CLIENT_H_