Android WebView visited link highlighting implementation part 1

android_webview/browser/renderer_host/aw_render_view_host_ext.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_BROWSER_RENDER_HOST_RENDER_VIEW_HOST_EXT_H_
 #define ANDROID_WEBVIEW_BROWSER_RENDER_HOST_RENDER_VIEW_HOST_EXT_H_
 
 #include "content/public/browser/web_contents_observer.h"
 
 #include "android_webview/common/aw_hit_test_data.h"
 #include "base/callback_forward.h"
 #include "base/threading/non_thread_safe.h"
+#include "components/visitedlink/browser/visitedlink_delegate.h"
+#include "components/visitedlink/browser/visitedlink_master.h"
+
+namespace content {
+struct FrameNavigateParams;
+struct LoadCommittedDetails;
+}  // namespace content
 
 namespace android_webview {
 
 // Provides RenderViewHost wrapper functionality for sending WebView-specific
 // IPC messages to the renderer and from there to WebKit.
 class AwRenderViewHostExt : public content::WebContentsObserver,
-                            public base::NonThreadSafe {
+                            public base::NonThreadSafe,
+                            public components::VisitedLinkDelegate {
  public:
   class Client {
    public:
     virtual void OnPictureUpdated(int process_id, int render_view_id) = 0;
 
    protected:
     virtual ~Client() {}
   };
 
   // To send receive messages to a RenderView we take the WebContents instance,
@@ skipping 16 matching lines @@
   bool HasNewHitTestData() const;
   void MarkHitTestDataRead();
 
   // Return |last_hit_test_data_|. Note that this is unavoidably racy;
   // the corresponding public WebView API is as well.
   const AwHitTestData& GetLastHitTestData() const;
 
  private:
   // content::WebContentsObserver implementation.
   virtual void RenderViewGone(base::TerminationStatus status) OVERRIDE;
+  virtual void DidNavigateAnyFrame(
+      const content::LoadCommittedDetails& details,
+      const content::FrameNavigateParams& params) OVERRIDE;
   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
 
+  // components::VisitedLinkDelegate implementation.
+  virtual bool PersistToDisk() const OVERRIDE;
+  virtual bool AreEquivalentContexts(
+      content::BrowserContext* context1,
+      content::BrowserContext* context2) OVERRIDE;
+  virtual void RebuildTable(
+      const scoped_refptr<URLEnumerator>& enumerator) OVERRIDE;
+
   void OnDocumentHasImagesResponse(int msg_id, bool has_images);
   void OnUpdateHitTestData(const AwHitTestData& hit_test_data);
   void OnPictureUpdated();
 
   std::map<int, DocumentHasImagesResult> pending_document_has_images_requests_;
 
   // Master copy of hit test data on the browser side. This is updated
   // as a result of DoHitTest called explicitly or when the FocusedNodeChanged
   // is called in AwRenderViewExt.
   AwHitTestData last_hit_test_data_;
 
   bool has_new_hit_test_data_;
 
+  components::VisitedLinkMaster visitedlink_master_;
+
   Client* client_;
 
   DISALLOW_COPY_AND_ASSIGN(AwRenderViewHostExt);
 };
 
 }  // namespace android_webview
 
 #endif  // ANDROID_WEBVIEW_BROWSER_RENDER_HOST_RENDER_VIEW_HOST_EXT_H_