Remove "theme" in extension/app unpacker error messages, make those messages localizable, and add u…

chrome/common/extensions/unpacker.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_UNPACKER_H_
 #define CHROME_COMMON_EXTENSIONS_UNPACKER_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 68 matching lines @@
   // Decodes the image at the given path and puts it in our list of decoded
   // images.
   bool AddDecodedImage(const FilePath& path);
 
   // Parses the catalog at the given path and puts it in our list of parsed
   // catalogs.
   bool ReadMessageCatalog(const FilePath& message_path);
 
   // Set the error message.
   void SetError(const std::string& error);
+  void SetUTF16Error(const string16& error);
 
   // The extension to unpack.
   FilePath extension_path_;
 
   // The extension ID if known.
   std::string extension_id_;
 
   // The location to use for the created extension.
   Extension::Location location_;
 
@@ skipping 16 matching lines @@
 
   // The last error message that was set.  Empty if there were no errors.
   string16 error_message_;
 
   DISALLOW_COPY_AND_ASSIGN(Unpacker);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_COMMON_EXTENSIONS_UNPACKER_H_