Determine mask UVs based on texture size

cc/layers/layer_impl.cc

Index: cc/layers/layer_impl.cc
diff --git a/cc/layers/layer_impl.cc b/cc/layers/layer_impl.cc
index 3006bd5ad50e3f9d39bc95add9f8f63b18d769da..6b1a1d0bcc0f671abf75f631a29b83f040b0c767 100644
--- a/cc/layers/layer_impl.cc
+++ b/cc/layers/layer_impl.cc
@@ -260,7 +260,8 @@ void LayerImpl::AppendDebugBorderQuad(RenderPass* render_pass,
 }
 
 void LayerImpl::GetContentsResourceId(ResourceId* resource_id,
-                                      gfx::Size* resource_size) const {
+                                      gfx::Size* resource_size,
+                                      gfx::SizeF* resource_uv_size) const {
   NOTREACHED();
   *resource_id = 0;
 }