Raster PictureLayerTiling with fractional translation

cc/raster/raster_source.cc

Index: cc/raster/raster_source.cc
diff --git a/cc/raster/raster_source.cc b/cc/raster/raster_source.cc
index 43d7792336be2b6c7da6bb0f1ec0e3943f3d295c..a890f14430f6a08bb7ee54a758b06f79284f6b35 100644
--- a/cc/raster/raster_source.cc
+++ b/cc/raster/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/debug/traced_value.h"
 #include "cc/paint/display_item_list.h"
@@ -64,7 +65,7 @@ void RasterSource::PlaybackToCanvas(SkCanvas* raster_canvas,
                                     const gfx::ColorSpace& canvas_color_space,
                                     const gfx::Rect& canvas_bitmap_rect,
                                     const gfx::Rect& canvas_playback_rect,
-                                    float raster_scale,
+                                    const ScaleTranslate2d& raster_transform,
                                     const PlaybackSettings& settings) const {
   SkIRect raster_bounds = gfx::RectToSkIRect(canvas_bitmap_rect);
   if (!canvas_playback_rect.IsEmpty() &&
@@ -76,7 +77,7 @@ 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(raster_scale, raster_scale);
+  raster_transform.ApplyToCanvas(raster_canvas);
   PlaybackToCanvas(raster_canvas, canvas_color_space, settings);
   raster_canvas->restore();
 }