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

ui/base/resource/resource_bundle.cc

Index: ui/base/resource/resource_bundle.cc
diff --git a/ui/base/resource/resource_bundle.cc b/ui/base/resource/resource_bundle.cc
index 7ae0f4e045f0d22e1fad85bb9917493b7828197c..f1722ffd5b95e0c3dcd7d730de9c1460c1897007 100644
--- a/ui/base/resource/resource_bundle.cc
+++ b/ui/base/resource/resource_bundle.cc
@@ -11,6 +11,7 @@
 #include "base/stl_util.h"
 #include "base/string_piece.h"
 #include "base/synchronization/lock.h"
+#include "base/utf_string_conversions.h"
 #include "build/build_config.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "ui/base/l10n/l10n_util.h"
@@ -187,10 +188,19 @@ string16 ResourceBundle::GetLocalizedString(int message_id) {
     }
   }
 
-  // Data pack encodes strings as UTF16.
-  DCHECK_EQ(data.length() % 2, 0U);
-  string16 msg(reinterpret_cast<const char16*>(data.data()),
-               data.length() / 2);
+  // Strings should not be loaded from a data pack that contains binary data.
+  DCHECK(locale_resources_data_->GetTextEncodingType() == DataPack::UTF16 ||
+         locale_resources_data_->GetTextEncodingType() == DataPack::UTF8)
+      << "requested localized string from binary pack file";
+
+  // Data pack encodes strings as either UTF8 or UTF16.
+  string16 msg;
+  if (locale_resources_data_->GetTextEncodingType() == DataPack::UTF16) {
+    msg = string16(reinterpret_cast<const char16*>(data.data()),
+                   data.length() / 2);
+  } else if (locale_resources_data_->GetTextEncodingType() == DataPack::UTF8) {
+    msg = UTF8ToUTF16(data);
+  }
   return msg;
 }