Implementation of the "Redirect URLs to Packaged Apps" feature.

chrome/common/extensions/extension_set.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 CHROME_COMMON_EXTENSIONS_EXTENSION_SET_H_
 #define CHROME_COMMON_EXTENSIONS_EXTENSION_SET_H_
 
 #include <iterator>
 #include <map>
 #include <string>
 
 #include "base/gtest_prod_util.h"
 #include "base/memory/ref_counted.h"
 #include "chrome/common/extensions/extension.h"
 #include "googleurl/src/gurl.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebSecurityOrigin.h"
 
+namespace extensions {
+struct UrlHandlerInfo;
+};
+
 class ExtensionURLInfo {
  public:
   // The extension system uses both a document's origin and its URL to
   // grant permissions. Ideally, we would use only the origin, but because
   // the web extent of a hosted app can be less than an entire origin, we
   // take the URL into account as well
   ExtensionURLInfo(WebKit::WebSecurityOrigin origin, const GURL& url);
 
   // WARNING! Using this constructor can miss important security checks if
   //          you're trying to find a running extension. For example, if the
@@ skipping 110 matching lines @@
 
  private:
   FRIEND_TEST_ALL_PREFIXES(ExtensionSetTest, ExtensionSet);
 
   ExtensionMap extensions_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionSet);
 };
 
 #endif  // CHROME_COMMON_EXTENSIONS_EXTENSION_SET_H_