Updated *.pak file format to support both UTF8 and UTF16

ui/base/resource/data_pack.h

 // Copyright (c) 2011 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.
 
 // DataPack represents a read-only view onto an on-disk file that contains
 // (key, value) pairs of data.  It's used to store static resources like
 // translation strings and images.
 
 #ifndef UI_BASE_RESOURCE_DATA_PACK_H_
 #define UI_BASE_RESOURCE_DATA_PACK_H_
@@ skipping 13 matching lines @@
 }
 
 namespace file_util {
 class MemoryMappedFile;
 }
 
 namespace ui {
 
 class UI_EXPORT DataPack {
  public:
+  // What type of encoding the text resources use.
+  enum TextEncodingType {
+    BINARY,
+    UTF8,
+    UTF16
+  };
+
   DataPack();
   ~DataPack();
 
   // Load a pack file from |path|, returning false on error.
   bool Load(const FilePath& path);
 
   // Get resource by id |resource_id|, filling in |data|.
   // The data is owned by the DataPack object and should not be modified.
   // Returns false if the resource id isn't found.
   bool GetStringPiece(uint16 resource_id, base::StringPiece* data) const;
 
   // Like GetStringPiece(), but returns a reference to memory. This interface
   // is used for image data, while the StringPiece interface is usually used
   // for localization strings.
   RefCountedStaticMemory* GetStaticMemory(uint16 resource_id) const;
 
-  // Writes a pack file containing |resources| to |path|.
+  // Writes a pack file containing |resources| to |path|. If there are any
+  // text resources to be written, their encoding must already agree to the
+  // |textEncodingType| specified. If no text resources are present, please
+  // indicate BINARY.
   static bool WritePack(const FilePath& path,
-                        const std::map<uint16, base::StringPiece>& resources);
+                        const std::map<uint16, base::StringPiece>& resources,
+                        TextEncodingType textEncodingType);
+
+  // Get the encoding type of text resources.
+  TextEncodingType GetTextEncodingType() const { return text_encoding_type_; }
 
  private:
   // The memory-mapped data.
   scoped_ptr<file_util::MemoryMappedFile> mmap_;
 
   // Number of resources in the data.
   size_t resource_count_;
 
+  // Type of encoding for text resources.
+  TextEncodingType text_encoding_type_;
+
   DISALLOW_COPY_AND_ASSIGN(DataPack);
 };
 
 }  // namespace ui
 
 #endif  // UI_BASE_RESOURCE_DATA_PACK_H_