Add display-resolution caching to GPU IDC

cc/playback/draw_image.h

Index: cc/playback/draw_image.h
diff --git a/cc/playback/draw_image.h b/cc/playback/draw_image.h
index 4daa16075debdfcb41330afbdc428bbcb8f9ea7b..6323a636f6412f02eb803cf0b65c02cbf2cb1030 100644
--- a/cc/playback/draw_image.h
+++ b/cc/playback/draw_image.h
@@ -34,8 +34,12 @@ class CC_EXPORT DrawImage {
   const SkMatrix& matrix() const { return matrix_; }
 
   DrawImage ApplyScale(float scale) const {
+    return ApplyScale(SkSize::Make(scale, scale));
+  }
+
+  DrawImage ApplyScale(const SkSize& scale) const {
     SkMatrix scaled_matrix = matrix_;
-    scaled_matrix.postScale(scale, scale);
+    scaled_matrix.postScale(scale.width(), scale.height());
     return DrawImage(image_, src_rect_, filter_quality_, scaled_matrix);
   }