[4/5] Add translated rasterization support for PictureLayerTilingSet & below

cc/tiles/tile.h

Index: cc/tiles/tile.h
diff --git a/cc/tiles/tile.h b/cc/tiles/tile.h
index 8da46d69657a08962e36599235b90ae4fe472d81..6a15784f8031e35727658c086102b2e2fbf718b4 100644
--- a/cc/tiles/tile.h
+++ b/cc/tiles/tile.h
@@ -10,6 +10,7 @@
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
+#include "cc/base/scale_translate2d.h"
 #include "cc/raster/tile_task.h"
 #include "cc/tiles/tile_draw_info.h"
 #include "ui/gfx/geometry/rect.h"
@@ -32,18 +33,18 @@ class CC_EXPORT Tile {
     int tiling_j_index;
     gfx::Rect enclosing_layer_rect;
     gfx::Rect content_rect;
-    gfx::SizeF raster_scales;
+    ScaleTranslate2d raster_transform;
 
     CreateInfo(int tiling_i_index,
                int tiling_j_index,
                const gfx::Rect& enclosing_layer_rect,
                const gfx::Rect& content_rect,
-               const gfx::SizeF& raster_scales)
+               const ScaleTranslate2d& raster_transform)
         : tiling_i_index(tiling_i_index),
           tiling_j_index(tiling_j_index),
           enclosing_layer_rect(enclosing_layer_rect),
           content_rect(content_rect),
-          raster_scales(raster_scales) {}
+          raster_transform(raster_transform) {}
   };
 
   enum TileRasterFlags { USE_PICTURE_ANALYSIS = 1 << 0, IS_OPAQUE = 1 << 1 };
@@ -75,8 +76,10 @@ class CC_EXPORT Tile {
   const TileDrawInfo& draw_info() const { return draw_info_; }
   TileDrawInfo& draw_info() { return draw_info_; }
 
-  float contents_scale_key() const { return raster_scales_.width(); }
-  const gfx::SizeF& raster_scales() const { return raster_scales_; }
+  float contents_scale_key() const { return raster_transform_.scale(); }
+  const ScaleTranslate2d& raster_transform() const {
+    return raster_transform_;
+  }
   const gfx::Rect& content_rect() const { return content_rect_; }
   const gfx::Rect& enclosing_layer_rect() const {
     return enclosing_layer_rect_;
@@ -129,7 +132,7 @@ class CC_EXPORT Tile {
   TileManager* const tile_manager_;
   const gfx::Rect content_rect_;
   const gfx::Rect enclosing_layer_rect_;
-  const gfx::SizeF raster_scales_;
+  const ScaleTranslate2d raster_transform_;
 
   TileDrawInfo draw_info_;