cc: Adding support for RGBA_4444 tile textures

cc/resources/resource_format.cc

Index: cc/resources/resource_format.cc
diff --git a/cc/resources/resource_format.cc b/cc/resources/resource_format.cc
new file mode 100644
index 0000000000000000000000000000000000000000..28bb1e4dced02d4dede3cab4cf59c71628a1bf8b
--- /dev/null
+++ b/cc/resources/resource_format.cc
@@ -0,0 +1,24 @@
+// 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.
+
+#include "cc/resources/resource_format.h"
+
+namespace cc {
+
+SkBitmap::Config SkBitmapConfigFromFormat(ResourceFormat format) {
+  switch (format) {
+    case RGBA_4444:
+      return SkBitmap::kARGB_4444_Config;
+    case RGBA_8888:
+    case BGRA_8888:
+      return SkBitmap::kARGB_8888_Config;
+    case LUMINANCE_8:
+      NOTREACHED();
+      break;
+  }
+  NOTREACHED();
+  return SkBitmap::kARGB_8888_Config;
+}
+
+}  // namespace cc