Implement a ResourceThrottle for URL overriding in Chrome on Android.

content/browser/child_process_security_policy_impl.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_BROWSER_CHILD_PROCESS_SECURITY_POLICY_IMPL_H_
 #define CONTENT_BROWSER_CHILD_PROCESS_SECURITY_POLICY_IMPL_H_
 
 #pragma once
 
 #include <map>
@@ skipping 24 matching lines @@
   virtual void RegisterDisabledSchemes(const std::set<std::string>& schemes)
       OVERRIDE;
   virtual void GrantPermissionsForFile(int child_id,
                                        const FilePath& file,
                                        int permissions) OVERRIDE;
   virtual void GrantReadFile(int child_id, const FilePath& file) OVERRIDE;
   virtual void GrantScheme(int child_id, const std::string& scheme) OVERRIDE;
   virtual void GrantAccessFileSystem(int child_id,
                                      const std::string& filesystem_id) OVERRIDE;
   virtual bool CanReadFile(int child_id, const FilePath& file) OVERRIDE;
+  virtual bool CanRequestURL(int child_id, const GURL& url) OVERRIDE;
 
   // Pseudo schemes are treated differently than other schemes because they
   // cannot be requested like normal URLs.  There is no mechanism for revoking
   // pseudo schemes.
   void RegisterPseudoScheme(const std::string& scheme);
 
   // Returns true iff |scheme| has been registered as pseudo scheme.
   bool IsPseudoScheme(const std::string& scheme);
 
   // Returns true iff |scheme| is listed as a disabled scheme.
@@ skipping 27 matching lines @@
 
   // Grant the child process the ability to use Web UI Bindings.
   void GrantWebUIBindings(int child_id);
 
   // Grant the child process the ability to read raw cookies.
   void GrantReadRawCookies(int child_id);
 
   // Revoke read raw cookies permission.
   void RevokeReadRawCookies(int child_id);
 
-  // Before servicing a child process's request for a URL, the browser should
-  // call this method to determine whether the process has the capability to
-  // request the URL.
-  bool CanRequestURL(int child_id, const GURL& url);
-
   // Before servicing a child process's request to enumerate a directory
   // the browser should call this method to check for the capability.
   bool CanReadDirectory(int child_id, const FilePath& directory);
 
   // Determines if certain permissions were granted for a file. |permissions|
   // must be a bit-set of base::PlatformFileFlags.
   bool HasPermissionsForFile(int child_id,
                              const FilePath& file,
                              int permissions);
 
@@ skipping 65 matching lines @@
   SecurityStateMap security_state_;
 
   // This maps keeps the record of which js worker thread child process
   // corresponds to which main js thread child process.
   WorkerToMainProcessMap worker_map_;
 
   DISALLOW_COPY_AND_ASSIGN(ChildProcessSecurityPolicyImpl);
 };
 
 #endif  // CONTENT_BROWSER_CHILD_PROCESS_SECURITY_POLICY_IMPL_H_