Add base:: to string16 in extensions/.

extensions/common/manifest_handlers/background_info.h

 // Copyright 2013 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 EXTENSIONS_COMMON_MANIFEST_HANDLERS_BACKGROUND_INFO_H_
 #define EXTENSIONS_COMMON_MANIFEST_HANDLERS_BACKGROUND_INFO_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 23 matching lines @@
   }
 
   bool has_persistent_background_page() const {
     return has_background_page() && is_persistent_;
   }
 
   bool has_lazy_background_page() const {
     return has_background_page() && !is_persistent_;
   }
 
-  bool Parse(const Extension* extension, string16* error);
+  bool Parse(const Extension* extension, base::string16* error);
 
  private:
   bool LoadBackgroundScripts(const Extension* extension,
                              const std::string& key,
-                             string16* error);
+                             base::string16* error);
   bool LoadBackgroundPage(const Extension* extension,
                           const std::string& key,
-                          string16* error);
-  bool LoadBackgroundPage(const Extension* extension, string16* error);
-  bool LoadBackgroundPersistent(const Extension* extension, string16* error);
-  bool LoadAllowJSAccess(const Extension* extension, string16* error);
+                          base::string16* error);
+  bool LoadBackgroundPage(const Extension* extension, base::string16* error);
+  bool LoadBackgroundPersistent(const Extension* extension,
+                                base::string16* error);
+  bool LoadAllowJSAccess(const Extension* extension, base::string16* error);
 
   // Optional URL to a master page of which a single instance should be always
   // loaded in the background.
   GURL background_url_;
 
   // Optional list of scripts to use to generate a background page. If this is
   // present, background_url_ will be empty and generated by GetBackgroundURL().
   std::vector<std::string> background_scripts_;
 
   // True if the background page should stay loaded forever; false if it should
   // load on-demand (when it needs to handle an event). Defaults to true.
   bool is_persistent_;
 
   // True if the background page can be scripted by pages of the app or
   // extension, in which case all such pages must run in the same process.
   // False if such pages are not permitted to script the background page,
   // allowing them to run in different processes.
   // Defaults to true.
   bool allow_js_access_;
 
   DISALLOW_COPY_AND_ASSIGN(BackgroundInfo);
 };
 
 // Parses all background/event page-related keys in the manifest.
 class BackgroundManifestHandler : public ManifestHandler {
  public:
   BackgroundManifestHandler();
   virtual ~BackgroundManifestHandler();
 
-  virtual bool Parse(Extension* extension, string16* error) OVERRIDE;
+  virtual bool Parse(Extension* extension, base::string16* error) OVERRIDE;
   virtual bool Validate(const Extension* extension,
                         std::string* error,
                         std::vector<InstallWarning>* warnings) const OVERRIDE;
   virtual bool AlwaysParseForType(Manifest::Type type) const OVERRIDE;
 
  private:
   virtual const std::vector<std::string> Keys() const OVERRIDE;
 
   DISALLOW_COPY_AND_ASSIGN(BackgroundManifestHandler);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_COMMON_MANIFEST_HANDLERS_BACKGROUND_INFO_H_