cc: Add mask target size to the effect tree

cc/trees/effect_node.h

Index: cc/trees/effect_node.h
diff --git a/cc/trees/effect_node.h b/cc/trees/effect_node.h
index b4f722ae50811f90d62db3791d9515e7b04f42ef..f36d8530d11056061801bbc8fb9782b2aed2efc9 100644
--- a/cc/trees/effect_node.h
+++ b/cc/trees/effect_node.h
@@ -8,6 +8,7 @@
 #include "cc/base/cc_export.h"
 #include "cc/output/filter_operations.h"
 #include "third_party/skia/include/core/SkXfermode.h"
+#include "ui/gfx/geometry/size_f.h"
 
 namespace base {
 namespace trace_event {
@@ -41,6 +42,8 @@ struct CC_EXPORT EffectNode {
 
   gfx::Vector2dF surface_contents_scale;
 
+  gfx::Size unscaled_mask_target_size;
+
   bool has_render_surface;
   RenderSurfaceImpl* render_surface;
   bool has_copy_request;