Raster PictureLayerTiling with fractional translation

cc/playback/raster_source.cc

Index: cc/playback/raster_source.cc
diff --git a/cc/playback/raster_source.cc b/cc/playback/raster_source.cc
index 0dc9c6c520cc2dcddf0e10b67562b76c795f80b7..9edded7cbec26c5c3b3e2f34b2f638652a34c002 100644
--- a/cc/playback/raster_source.cc
+++ b/cc/playback/raster_source.cc
@@ -9,6 +9,7 @@
 #include "base/trace_event/trace_event.h"
 #include "cc/base/math_util.h"
 #include "cc/base/region.h"
+#include "cc/base/scale_translate2d.h"
 #include "cc/debug/debug_colors.h"
 #include "cc/playback/display_item_list.h"
 #include "cc/playback/image_hijack_canvas.h"
@@ -67,7 +68,7 @@ RasterSource::~RasterSource() {
 void RasterSource::PlaybackToCanvas(SkCanvas* raster_canvas,
                                     const gfx::Rect& canvas_bitmap_rect,
                                     const gfx::Rect& canvas_playback_rect,
-                                    float contents_scale,
+                                    const ScaleTranslate2d& contents_transform,
                                     const PlaybackSettings& settings) const {
   SkIRect raster_bounds = gfx::RectToSkIRect(canvas_bitmap_rect);
   if (!canvas_playback_rect.IsEmpty() &&
@@ -79,7 +80,7 @@ void RasterSource::PlaybackToCanvas(SkCanvas* raster_canvas,
   raster_canvas->save();
   raster_canvas->translate(-canvas_bitmap_rect.x(), -canvas_bitmap_rect.y());
   raster_canvas->clipRect(SkRect::MakeFromIRect(raster_bounds));
-  raster_canvas->scale(contents_scale, contents_scale);
+  contents_transform.ApplyToCanvas(raster_canvas);
   PlaybackToCanvas(raster_canvas, settings);
   raster_canvas->restore();
 }