Add a non-blocking "OneShotEvent" class

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>
@@ skipping 26 matching lines @@
   GURL url_;
 };
 
 // The one true extension container. Extensions are identified by their id.
 // Only one extension can be in the set with a given ID.
 class ExtensionSet {
  public:
   typedef std::pair<base::FilePath, std::string> ExtensionPathAndDefaultLocale;
   typedef std::map<std::string, scoped_refptr<const extensions::Extension> >
       ExtensionMap;
+  typedef scoped_refptr<const extensions::Extension> value_type;

[Devlin, 2013/05/15 00:21:16]

Never used.

[Jeffrey Yasskin, 2013/05/15 03:07:18]

Whoops. I took out the gmock assertion that would have used it. Thanks.

 
   // Iteration over the values of the map (given that it's an ExtensionSet,
   // it should iterate like a set iterator).
   class const_iterator :
       public std::iterator<std::input_iterator_tag,
                            scoped_refptr<const extensions::Extension> > {
    public:
     const_iterator();
     const_iterator(const const_iterator& other);
     explicit const_iterator(ExtensionMap::const_iterator it);
@@ skipping 82 matching lines @@
 
  private:
   FRIEND_TEST_ALL_PREFIXES(ExtensionSetTest, ExtensionSet);
 
   ExtensionMap extensions_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionSet);
 };
 
 #endif  // CHROME_COMMON_EXTENSIONS_EXTENSION_SET_H_