Add explicit base namespace to string16 users.

chrome/common/extensions/command.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_COMMAND_H_
 #define CHROME_COMMON_EXTENSIONS_COMMAND_H_
 
 #include <map>
 #include <string>
 
 #include "base/strings/string16.h"
 #include "ui/base/accelerators/accelerator.h"
 
 namespace base {
 class DictionaryValue;
 }
 
 namespace extensions {
 class Extension;
 }
 
 namespace extensions {
 
 class Command {
  public:
   Command();
   Command(const std::string& command_name,
-          const string16& description,
+          const base::string16& description,
           const std::string& accelerator,
           bool global);
   ~Command();
 
   // The platform value for the Command.
   static std::string CommandPlatform();
 
   // Parse a string as an accelerator. If the accelerator is unparsable then
   // a generic ui::Accelerator object will be returns (with key_code Unknown).
   static ui::Accelerator StringToAccelerator(const std::string& accelerator,
                                              const std::string& command_name);
 
   // Returns the string representation of an accelerator without localizing the
   // shortcut text (like accelerator::GetShortcutText() does).
   static std::string AcceleratorToString(const ui::Accelerator& accelerator);
 
   // Parse the command.
   bool Parse(const base::DictionaryValue* command,
              const std::string& command_name,
              int index,
-             string16* error);
+             base::string16* error);
 
   // Convert a Command object from |extension| to a DictionaryValue.
   // |active| specifies whether the command is active or not.
   base::DictionaryValue* ToValue(
       const Extension* extension, bool active) const;
 
   // Accessors:
   const std::string& command_name() const { return command_name_; }
   const ui::Accelerator& accelerator() const { return accelerator_; }
-  const string16& description() const { return description_; }
+  const base::string16& description() const { return description_; }
   bool global() const { return global_; }
 
   // Setter:
   void set_accelerator(ui::Accelerator accelerator) {
     accelerator_ = accelerator;
   }
   void set_global(bool global) {
     global_ = global;
   }
 
  private:
   std::string command_name_;
   ui::Accelerator accelerator_;
-  string16 description_;
+  base::string16 description_;
   bool global_;
 };
 
 // A mapping of command name (std::string) to a command object.
 typedef std::map<std::string, Command> CommandMap;
 
 }  // namespace extensions
 
 #endif  // CHROME_COMMON_EXTENSIONS_COMMAND_H_