[Windows] Finish global and non-global media keys support on Windows.

chrome/browser/extensions/extension_keybinding_registry.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_BROWSER_EXTENSIONS_EXTENSION_KEYBINDING_REGISTRY_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_KEYBINDING_REGISTRY_H_
 
 #include <map>
 #include <string>
 
@@ skipping 66 matching lines @@
       const ui::Accelerator& accelerator,
       const std::string& command_name) = 0;
 
   // Make sure all extensions registered have keybindings added.
   void Init();
 
   // Whether to ignore this command. Only browserAction commands and pageAction
   // commands are currently ignored, since they are handled elsewhere.
   bool ShouldIgnoreCommand(const std::string& command) const;
 
+  // Fire event targets which the specified accelerator is binding with. Returns
+  // true if we can find the appropriate event targets.
+  bool NotifyEventTargetsByAccelerator(const ui::Accelerator& accelerator);
+
   // Notifies appropriate parties that a command has been executed.
   void CommandExecuted(const std::string& extension_id,
                        const std::string& command);
 
   // Maps an accelerator to a string pair (extension id, command name) for
   // commands that have been registered. This keeps track of the targets for the
   // keybinding event (which named command to call in which extension). On GTK,
   // this map contains registration for pageAction and browserAction commands,
   // whereas on other platforms it does not.
   typedef std::map< ui::Accelerator,
                     std::pair<std::string, std::string> > EventTargets;
   EventTargets event_targets_;
 
+  // Maps an accelerator that are media keys to a list of string pair (extension
+  // id, command name) for media keys commands that have been registered.
+  typedef std::list<std::pair<std::string, std::string> > TargetList;
+  typedef std::map<ui::Accelerator, TargetList> MediaKeysEventTargets;
+  MediaKeysEventTargets media_keys_event_targets_;
+
  private:
   // Returns true if the |extension| matches our extension filter.
   bool ExtensionMatchesFilter(const extensions::Extension* extension);
 
   // The content notification registrar for listening to extension events.
   content::NotificationRegistrar registrar_;
 
   // Weak pointer to our profile. Not owned by us.
   Profile* profile_;
 
   // What extensions to register keybindings for.
   ExtensionFilter extension_filter_;
 
   // Weak pointer to our delegate. Not owned by us. Must outlive this class.
   Delegate* delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionKeybindingRegistry);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_KEYBINDING_REGISTRY_H_