Add SkEncodedFormat, used by SkCodec.

include/codec/SkEncodedFormat.h

Index: include/codec/SkEncodedFormat.h
diff --git a/include/codec/SkEncodedFormat.h b/include/codec/SkEncodedFormat.h
new file mode 100644
index 0000000000000000000000000000000000000000..003159a8de27f59d5b65f423045dacd92d4e2897
--- /dev/null
+++ b/include/codec/SkEncodedFormat.h
@@ -0,0 +1,27 @@
+/*
+ * Copyright 2015 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef SkEncodedFormat_DEFINED
+#define SkEncodedFormat_DEFINED
+
+/**
+ *  Enum describing format of encoded data.
+ */
+enum SkEncodedFormat {
+    kUnknown_SkEncodedFormat,
+    kBMP_SkEncodedFormat,
+    kGIF_SkEncodedFormat,
+    kICO_SkEncodedFormat,
+    kJPEG_SkEncodedFormat,
+    kPNG_SkEncodedFormat,
+    kWBMP_SkEncodedFormat,
+    kWEBP_SkEncodedFormat,
+    kPKM_SkEncodedFormat,
+    kKTX_SkEncodedFormat,
+    kASTC_SkEncodedFormat,
+};
+#endif  // SkEncodedFormat_DEFINED