Set desired_image_size when decoding images for NTP Tile icons.

services/image_decoder/image_decoder_impl_unittest.cc

Index: services/image_decoder/image_decoder_impl_unittest.cc
diff --git a/services/image_decoder/image_decoder_impl_unittest.cc b/services/image_decoder/image_decoder_impl_unittest.cc
index a04f21d30926a16cab5b033972daa29fc48ec973..c47b45dd1caebd31ca5dca59c2d4919a2c03946c 100644
--- a/services/image_decoder/image_decoder_impl_unittest.cc
+++ b/services/image_decoder/image_decoder_impl_unittest.cc
@@ -53,6 +53,7 @@ class Request {
   void DecodeImage(const std::vector<unsigned char>& image, bool shrink) {
     decoder_->DecodeImage(
         image, mojom::ImageCodec::DEFAULT, shrink, kTestMaxImageSize,
+        gfx::Size(),

[Mathieu, 2017/03/01 14:36:23]

add a comment: no preferred size, want the biggest, etc?

[tschumann, 2017/03/01 19:40:08]

it's actually the smallest :-) I added a comment -- in particular because the
code doesn't care.

         base::Bind(&Request::OnRequestDone, base::Unretained(this)));
   }