cc: Move tiling management out of draw properties calculation.

cc/trees/layer_tree_host_common.cc

Index: cc/trees/layer_tree_host_common.cc
diff --git a/cc/trees/layer_tree_host_common.cc b/cc/trees/layer_tree_host_common.cc
index 34f45530ff38f1340925bdbb5e80e2a32d66b439..ce9d4c5376b20c40d1d6a2109b3c98ea648f68bf 100644
--- a/cc/trees/layer_tree_host_common.cc
+++ b/cc/trees/layer_tree_host_common.cc
@@ -81,7 +81,7 @@ inline gfx::Rect CalculateVisibleRectWithCachedLayerRect(
   minimal_surface_rect.Intersect(layer_rect_in_target_space);
 
   if (minimal_surface_rect.IsEmpty())
-      return gfx::Rect();
+    return gfx::Rect();
 
   // Project the corners of the target surface rect into the layer space.
   // This bounding rectangle may be larger than it needs to be (being
@@ -1744,6 +1744,15 @@ static void CalculateDrawPropertiesInternal(
       combined_maximum_animation_contents_scale,
       animating_transform_to_screen);
 
+  layer_draw_properties.ideal_contents_scale = ideal_contents_scale;

[danakj, 2014/05/21 15:01:00]

Can we add a unit test to layer_tree_host_common_unittest.cc for each of these
new draw properties.

For each one set up a tree so that you get some edge cases for them and verify
the draw properties are being set correctly.

+  layer_draw_properties.maximum_animation_contents_scale =
+      combined_maximum_animation_contents_scale;
+  layer_draw_properties.page_scale =
+      data_from_ancestor.in_subtree_of_page_scale_application_layer
+          ? globals.page_scale_factor
+          : 1.f;
+  layer_draw_properties.device_scale = globals.device_scale_factor;
+
   // The draw_transform that gets computed below is effectively the layer's
   // draw_transform, unless the layer itself creates a render_surface. In that
   // case, the render_surface re-parents the transforms.