Implement delaying resource requests until privacy blacklists are ready.

chrome/browser/privacy_blacklist/blocked_response.h

-// Copyright (c) 2009 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 CHROME_BROWSER_PRIVACY_BLACKLIST_BLOCKED_RESPONSE_H_
-#define CHROME_BROWSER_PRIVACY_BLACKLIST_BLOCKED_RESPONSE_H_
-
-#include <string>
-#include <set>
-
-#include "chrome/browser/privacy_blacklist/blacklist.h"
-
-namespace chrome {
-
-extern const char kUnblockScheme[];
-extern const char kBlockScheme[];
-
-// Generate localized responses to replace blacklisted resources.
-// Blacklisted resources such as frames and iframes are replaced
-// by HTML. Non visual resources such as Javascript and CSS are
-// simply be cancelled so there is no blocked response for them.
-
-class BlockedResponse {
- public:
-  BlockedResponse() {}
-
-  // Returns the HTML document used as substituted content for blacklisted
-  // elements.
-  std::string GetHTML(const std::string& url, const Blacklist::Match* match);
-
-  // Returns the image (as a string because that is what is expected by callers)
-  // used as substituted content for blacklisted elements.
-  std::string GetImage(const Blacklist::Match* match);
-
-  // Returns HTTP headers for a blocked response replacing the given url.
-  std::string GetHeaders(const std::string& url);
-
-  // Gets the original url of a blocked resource from its blocked url.
-  // The input must be a chome-unblock://XXX url. If the unblock url is
-  // not found, then about:blank is returned.
-  std::string GetOriginalURL(const std::string& url);
-
- private:
-  // Returns a chrome-block://XXX link for the given requested URL.
-  std::string GetBlockedURL(const std::string& url);
-
-  // Returns a chrome-unblock://XXX link for the given chrome-block://YYY url.
-  std::string GetUnblockedURL(const std::string& url);
-
-  std::set<std::string> blocked_;
-
-  DISALLOW_COPY_AND_ASSIGN(BlockedResponse);
-};
-
-}
-
-#endif  // CHROME_BROWSER_PRIVACY_BLACKLIST_BLOCKED_RESPONSE_H_