cc cleanup: Update paths to geometry headers

Geometry headers were moved from /ui/gfx/ to ui/gfx/geometry.
Updating includes accordingly.

BUG=395370

Review URL: https://codereview.chromium.org/660333004

Cr-Commit-Position: refs/heads/master@{#300902}
diff --git a/cc/layers/paint_properties.h b/cc/layers/paint_properties.h
index 323e9499..b57f90f3 100644
--- a/cc/layers/paint_properties.h
+++ b/cc/layers/paint_properties.h
@@ -5,7 +5,7 @@
 #ifndef CC_LAYERS_PAINT_PROPERTIES_H_
 #define CC_LAYERS_PAINT_PROPERTIES_H_
 
-#include "ui/gfx/size.h"
+#include "ui/gfx/geometry/size.h"
 
 namespace cc {