cc: Include viewport clip in visible rect of unclipped surfaces

cc/trees/draw_property_utils.cc

Index: cc/trees/draw_property_utils.cc
diff --git a/cc/trees/draw_property_utils.cc b/cc/trees/draw_property_utils.cc
index a9b6f3d9114204ddd4e546070a07f6bb0dba34f0..7db6814424ebe5496040584f5d4ffc3e34553a1f 100644
--- a/cc/trees/draw_property_utils.cc
+++ b/cc/trees/draw_property_utils.cc
@@ -468,12 +468,8 @@ void CalculateVisibleRects(const LayerImplList& visible_layer_list,
         continue;
       }
     } else {
-      if (clip_node->target_is_clipped) {
-        combined_clip_rect_in_target_space =
-            clip_node->combined_clip_in_target_space;
-      } else {
-        combined_clip_rect_in_target_space = clip_node->clip_in_target_space;
-      }
+      combined_clip_rect_in_target_space =
+          clip_node->combined_clip_in_target_space;
     }
 
     // The clip rect should be intersected with layer rect in target space.