Raster PictureLayerTiling with fractional translation

cc/tiles/tile.h

Index: cc/tiles/tile.h
diff --git a/cc/tiles/tile.h b/cc/tiles/tile.h
index 76142e86699118f284d0e11acb86aba35ad80348..b58ed82f98b95d5e67f2b53dab125e8b09ad463a 100644
--- a/cc/tiles/tile.h
+++ b/cc/tiles/tile.h
@@ -35,17 +35,20 @@ class CC_EXPORT Tile {
     gfx::Rect enclosing_layer_rect;
     gfx::Rect content_rect;
     float contents_scale;
+    gfx::Vector2dF contents_translation;
 
     CreateInfo(int tiling_i_index,
                int tiling_j_index,
                const gfx::Rect& enclosing_layer_rect,
                const gfx::Rect& content_rect,
-               float contents_scale)
+               float contents_scale,
+               const gfx::Vector2dF contents_translation)
         : tiling_i_index(tiling_i_index),
           tiling_j_index(tiling_j_index),
           enclosing_layer_rect(enclosing_layer_rect),
           content_rect(content_rect),
-          contents_scale(contents_scale) {}
+          contents_scale(contents_scale),
+          contents_translation(contents_translation) {}
   };
 
   enum TileRasterFlags { USE_PICTURE_ANALYSIS = 1 << 0, IS_OPAQUE = 1 << 1 };
@@ -78,6 +81,9 @@ class CC_EXPORT Tile {
   TileDrawInfo& draw_info() { return draw_info_; }
 
   float contents_scale() const { return contents_scale_; }
+  const gfx::Vector2dF& contents_translation() const {
+    return contents_translation_;
+  }
   const gfx::Rect& content_rect() const { return content_rect_; }
   const gfx::Rect& enclosing_layer_rect() const {
     return enclosing_layer_rect_;
@@ -124,6 +130,7 @@ class CC_EXPORT Tile {
   const gfx::Rect content_rect_;
   const gfx::Rect enclosing_layer_rect_;
   const float contents_scale_;
+  const gfx::Vector2dF contents_translation_;
 
   TileDrawInfo draw_info_;