content: Change appcache_interfaces.* to use contants from url/ component.

content/common/appcache_interfaces.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_COMMON_APPCACHE_APPCACHE_INTERFACES_H_
 #define CONTENT_COMMON_APPCACHE_APPCACHE_INTERFACES_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 145 matching lines @@
   virtual bool StartUpdate(int host_id) = 0;
   virtual bool SwapCache(int host_id) = 0;
   virtual void GetResourceList(
       int host_id, std::vector<AppCacheResourceInfo>* resource_infos) = 0;
 
  protected:
   virtual ~AppCacheBackend() {}
 };
 
 // Useful string constants.
-// Note: These are also defined elsewhere in the chrome code base in
-// url_contants.h .cc, however the content library can not have
-// any dependencies on the chrome library, so we can't use them in here.
-CONTENT_EXPORT extern const char kHttpScheme[];
-CONTENT_EXPORT extern const char kHttpsScheme[];
 CONTENT_EXPORT extern const char kHttpGETMethod[];
 CONTENT_EXPORT extern const char kHttpHEADMethod[];
 
 // base::CommandLine flag to turn this experimental feature on.
 CONTENT_EXPORT extern const char kEnableExecutableHandlers[];
 
 CONTENT_EXPORT bool IsSchemeSupportedForAppCache(const GURL& url);
 CONTENT_EXPORT bool IsMethodSupportedForAppCache(
     const std::string& method);
 CONTENT_EXPORT bool IsSchemeAndMethodSupportedForAppCache(
     const net::URLRequest* request);
 
 CONTENT_EXPORT extern const base::FilePath::CharType
     kAppCacheDatabaseName[];
 
 }  // namespace
 
 #endif  // CONTENT_COMMON_APPCACHE_APPCACHE_INTERFACES_H_