cc: Move tiling management out of draw properties calculation.

cc/layers/draw_properties.h

Index: cc/layers/draw_properties.h
diff --git a/cc/layers/draw_properties.h b/cc/layers/draw_properties.h
index 3f167b9b0b653c219f001f4072d149e700e0accc..e4c6e6d276aea4dbb3b5bb6fa45c078b546f103c 100644
--- a/cc/layers/draw_properties.h
+++ b/cc/layers/draw_properties.h
@@ -128,6 +128,14 @@ struct CC_EXPORT DrawProperties {
   // or the layer doesn't contribute anything, then this ID will be either out
   // of date or 0.
   int last_drawn_render_surface_layer_list_id;
+
+  // Content scales for the layer, used to set scales for tiling and raster.

[danakj, 2014/05/16 14:49:05]

how about

"The scale at which content for the layer should be rastered in order to be
perfectly crisp."

+  // Draw transform scales.
+  float ideal_contents_scale;

[danakj, 2014/05/16 14:49:05]

empty line between each one

+  // Max animation scale.

[danakj, 2014/05/16 14:49:05]

"The maximum scale during the layers current animation at which content should
be rastered at to be crisp."

+  float maximum_animation_contents_scale;
+  // Page scale factor.

[danakj, 2014/05/16 14:49:05]

"The page scale factor that is applied to the layer. Since some layers may have
page scale applied and others not, this may differ between layers."

+  float page_scale;
 };
 
 }  // namespace cc