Insert default stylesheet for platform apps.

chrome/common/extensions/extension_set.h

 // Copyright (c) 2011 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_
 #pragma once
 
 #include <map>
 #include <string>
@@ skipping 25 matching lines @@
   // Returns true if the set contains the specified extension.
   bool Contains(const std::string& id) const;
 
   // Adds the specified extension to the set. The set becomes an owner. Any
   // previous extension with the same ID is removed.
   void Insert(const scoped_refptr<const Extension>& extension);
 
   // Removes the specified extension.
   void Remove(const std::string& id);
 
+  // Empties the set.
+  void Clear();
+
   // Returns the extension ID that the given URL is a part of, or empty if
   // none. This includes web URLs that are part of an extension's web extent.
   std::string GetIdByURL(const GURL& url) const;
 
   // Returns the Extension that the given URL is a part of, or NULL if none.
   // This includes web URLs that are part of an extension's web extent.
   // NOTE: This can return NULL if called before UpdateExtensions receives
   // bulk extension data (e.g. if called from
   // EventBindings::HandleContextCreated)
   const Extension* GetByURL(const GURL& url) const;
@@ skipping 12 matching lines @@
 
  private:
   FRIEND_TEST_ALL_PREFIXES(ExtensionSetTest, ExtensionSet);
 
   ExtensionMap extensions_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionSet);
 };
 
 #endif  // CHROME_COMMON_EXTENSIONS_EXTENSION_SET_H_