override chrome:// URLs via extensions.

chrome/common/extensions/extension.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_COMMON_EXTENSIONS_EXTENSION_H_
 #define CHROME_COMMON_EXTENSIONS_EXTENSION_H_
 
 #include <map>
 #include <set>
 #include <string>
@@ skipping 244 matching lines @@
   void AddSupportedLocale(const std::string& supported_locale) {
     supported_locales_.insert(supported_locale);
   }
 
   // Getter/setter for a default_locale_.
   const std::string& default_locale() const { return default_locale_; }
   void set_default_locale(const std::string& default_locale) {
     default_locale_ = default_locale;
   }
 
+  // Chrome URL overrides (see ExtensionOverrideUI).
+  DictionaryValue* GetChromeURLOverrides() const {
+    return chrome_url_overrides_.get();
+  }
+
   // Runtime data:
   // Put dynamic data about the state of a running extension below.
 
   // Whether the background page, if any, is ready. We don't load other
   // components until then. If there is no background page, we consider it to
   // be ready.
   bool GetBackgroundPageReady();
   void SetBackgroundPageReady();
 
  private:
@@ skipping 100 matching lines @@
 
   // A copy of the manifest that this extension was created from.
   scoped_ptr<DictionaryValue> manifest_value_;
 
     // List of all locales extension supports.
   std::set<std::string> supported_locales_;
 
   // Default locale, used for fallback.
   std::string default_locale_;
 
+  // A map of chrome:// hostnames (newtab, downloads, etc.) to Extension URLs
+  // which override the handling of those URLs.
+  scoped_ptr<DictionaryValue> chrome_url_overrides_;
+
   // Runtime data:
 
   // True if the background page is ready.
   bool background_page_ready_;
 
   FRIEND_TEST(ExtensionTest, LoadPageActionHelper);
 
   DISALLOW_COPY_AND_ASSIGN(Extension);
 };
 
 #endif  // CHROME_COMMON_EXTENSIONS_EXTENSION_H_