Implement a ResourceThrottle for URL overriding in Chrome on Android.

content/public/browser/web_contents_delegate.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 CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_DELEGATE_H_
 #define CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_DELEGATE_H_
 #pragma once
 
 #include <set>
 #include <string>
@@ skipping 20 matching lines @@
 class BrowserContext;
 class ColorChooser;
 class DownloadItem;
 class JavaScriptDialogCreator;
 class RenderViewHost;
 class WebContents;
 class WebIntentsDispatcher;
 struct ContextMenuParams;
 struct FileChooserParams;
 struct NativeWebKeyboardEvent;
+struct Referrer;
 struct SSLStatus;
 }
 
 namespace gfx {
 class Point;
 class Rect;
 class Size;
 }
 
 namespace history {
@@ skipping 20 matching lines @@
   // should be opened in a new tab or window.
   //
   // A NULL source indicates the current tab (callers should probably use
   // OpenURL() for these cases which does it for you).
 
   // Returns the WebContents the URL is opened in, or NULL if the URL wasn't
   // opened immediately.
   virtual WebContents* OpenURLFromTab(WebContents* source,
                                       const OpenURLParams& params);
 
+  // Called for top-level navigation to decide whether the navigation should be
+  // allowed to proceed.
+  virtual bool ShouldIgnoreNavigation(
+      WebContents* source,
+      const GURL& validated_url,
+      const content::Referrer& referrer,
+      bool is_content_initiated);
+
   // Called to inform the delegate that the WebContents's navigation state
   // changed. The |changed_flags| indicates the parts of the navigation state
   // that have been updated, and is any combination of the
   // |WebContents::InvalidateTypes| bits.
   virtual void NavigationStateChanged(const WebContents* source,
                                       unsigned changed_flags) {}
 
   // Adds the navigation request headers to |headers|. Use
   // net::HttpUtil::AppendHeaderIfMissing to build the set of headers.
   virtual void AddNavigationHeaders(const GURL& url, std::string* headers) {}
@@ skipping 334 matching lines @@
   // Called when |this| is no longer the WebContentsDelegate for |source|.
   void Detach(WebContents* source);
 
   // The WebContents that this is currently a delegate for.
   std::set<WebContents*> attached_contents_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_DELEGATE_H_