Revert of Remove DCHECK_IMPLIES/CHECK_IMPLIES.

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 e02cf8b248e7de1e596688b7801dbf5a26b189d4..5af5fc1a2a361ef7036fdb93883dfb4fc77c59a9 100644
--- a/cc/trees/layer_tree_host_common.cc
+++ b/cc/trees/layer_tree_host_common.cc
@@ -415,8 +415,8 @@
          current_target->render_surface()->draw_transform();
 
     // If we have unclipped descendants, the draw transform is a translation.
-    DCHECK(!current_target->num_unclipped_descendants() ||
-           current_draw_transform.IsIdentityOrTranslation());
+    DCHECK_IMPLIES(current_target->num_unclipped_descendants(),
+                   current_draw_transform.IsIdentityOrTranslation());
 
     target_rect =
         MathUtil::MapEnclosingClippedRect(current_draw_transform, target_rect);