Resize images for hi-dpi based on a custom PNG chunk added by GRIT r78, and roll GRIT r78

ui/gfx/codec/png_codec.h

Index: ui/gfx/codec/png_codec.h
diff --git a/ui/gfx/codec/png_codec.h b/ui/gfx/codec/png_codec.h
index 3a6d295dbdf45a1e3d77d1711f7474bc190918c6..bf351918317f22c593adb5863b07166d8db8cce7 100644
--- a/ui/gfx/codec/png_codec.h
+++ b/ui/gfx/codec/png_codec.h
@@ -115,9 +115,17 @@ class UI_EXPORT PNGCodec {
   // images are. (There are a lot of themes that have a NTP image of about ~1
   // megabyte, and those require a 7-10 megabyte side buffer.)
   //
+  // If |scale_fallback| is not NULL, it is set to true if a csCl chunk is
+  // present in the image, false if not.
+  //
   // Returns true if data is non-null and can be decoded as a png, false
   // otherwise.
   static bool Decode(const unsigned char* input, size_t input_size,
+                     SkBitmap* bitmap, bool* scale_fallback);
+
+  // Equivalent to Decode(input, input_size, bitmap, NULL), for clients that
+  // don't need scale_fallback returned (which is most clients).
+  static bool Decode(const unsigned char* input, size_t input_size,
                      SkBitmap* bitmap);
 
   // Create a SkBitmap from a decoded BGRA DIB. The caller owns the returned