Add scale factor tag to data packs

ui/base/resource/resource_handle.cc

Index: ui/base/resource/resource_handle.cc
diff --git a/ui/base/resource/resource_handle.cc b/ui/base/resource/resource_handle.cc
new file mode 100644
index 0000000000000000000000000000000000000000..d0d7645bee4e29f58151732c12b0c4217874214b
--- /dev/null
+++ b/ui/base/resource/resource_handle.cc
@@ -0,0 +1,12 @@
+// 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.
+
+#include "ui/base/resource/resource_handle.h"
+
+namespace ui {
+
+const float ResourceHandle::kScaleFactor1x = 1.0;
+const float ResourceHandle::kScaleFactor2x = 2.0;
+
+}  // namespace ui