Make all the codecs default profiles based on gDefaultProfileIsSRGB.

include/private/SkImageInfoPriv.h

Index: include/private/SkImageInfoPriv.h
diff --git a/include/private/SkImageInfoPriv.h b/include/private/SkImageInfoPriv.h
new file mode 100644
index 0000000000000000000000000000000000000000..93ef2740a648619ff1748eeff22373692ba5bb9b
--- /dev/null
+++ b/include/private/SkImageInfoPriv.h
@@ -0,0 +1,19 @@
+/*
+ * Copyright 2016 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+#ifndef SkImageInfoPriv_DEFINED
+#define SkImageInfoPriv_DEFINED
+
+#include "SkImageInfo.h"
+
+// Indicate how images and gradients should interpret colors by default.
+extern bool gDefaultProfileIsSRGB;
+
+static SkColorProfileType SkDefaultColorProfile() {
+    return gDefaultProfileIsSRGB ? kSRGB_SkColorProfileType : kLinear_SkColorProfileType;
+}
+
+#endif  // SkImageInfoPriv_DEFINED