Add the ability to write comments to PNGCodec::Encode.

skia/ext/vector_canvas_unittest.cc

Index: skia/ext/vector_canvas_unittest.cc
diff --git a/skia/ext/vector_canvas_unittest.cc b/skia/ext/vector_canvas_unittest.cc
index 1066c0c8fba4f504a7365e4d5c15430f0a662b69..355aa138138d4b89ac764c5bc1c9d9b378fb2481 100644
--- a/skia/ext/vector_canvas_unittest.cc
+++ b/skia/ext/vector_canvas_unittest.cc
@@ -18,6 +18,7 @@
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/skia/include/effects/SkDashPathEffect.h"
 #include "ui/gfx/codec/png_codec.h"
+#include "ui/gfx/size.h"
 
 namespace skia {
 
@@ -126,10 +127,10 @@ class Image {
     std::vector<unsigned char> compressed;
     ASSERT_TRUE(gfx::PNGCodec::Encode(&*data_.begin(),
                                       gfx::PNGCodec::FORMAT_BGRA,
-                                      width_,
-                                      height_,
+                                      gfx::Size(width_, height_),
                                       row_length_,
                                       true,
+                                      std::vector<gfx::PNGCodec::Comment>(),
                                       &compressed));
     ASSERT_TRUE(compressed.size());
     FILE* f = file_util::OpenFile(filename, "wb");