GpuImageDecodeCache: Use legacy scaling

cc/tiles/gpu_image_decode_cache.cc

Index: cc/tiles/gpu_image_decode_cache.cc
diff --git a/cc/tiles/gpu_image_decode_cache.cc b/cc/tiles/gpu_image_decode_cache.cc
index 39a822617dba6ab31d8606c710c47382018a576a..f81630b446024893ee59b36ba07597f7e50046fe 100644
--- a/cc/tiles/gpu_image_decode_cache.cc
+++ b/cc/tiles/gpu_image_decode_cache.cc
@@ -1100,8 +1100,8 @@ void GpuImageDecodeCache::DecodeImageIfNecessary(const DrawImage& draw_image,
         // In order to match GPU scaling quality (which uses mip-maps at high
         // quality), we want to use at most medium filter quality for the
         // scale.
-        SkPixmap image_pixmap(image_info, backing_memory->data(),
-                              image_info.minRowBytes());
+        SkPixmap image_pixmap(image_info.makeColorSpace(nullptr),
+                              backing_memory->data(), image_info.minRowBytes());

[ccameron, 2017/04/17 18:40:03]

Ooh, good point.

         // Note that scalePixels falls back to readPixels if the sale is 1x, so
         // no need to special case that as an optimization.
         if (!draw_image.image()->scalePixels(