Fix broken MainThreadScrollingReason DCHECK.

cc/blink/web_layer_impl.cc

Index: cc/blink/web_layer_impl.cc
diff --git a/cc/blink/web_layer_impl.cc b/cc/blink/web_layer_impl.cc
index ce265035dcd77a59362f349f71c1c126efd18393..cd1033845a2eb042d5396fd056c297e45e21b25c 100644
--- a/cc/blink/web_layer_impl.cc
+++ b/cc/blink/web_layer_impl.cc
@@ -344,7 +344,7 @@ void WebLayerImpl::addMainThreadScrollingReasons(
   // TODO(tdresser): This is comparing less than a bit flag but that's not valid
   // if there is more than one reason given in |main_thread_scrolling_reasons|.
   DCHECK_LE(main_thread_scrolling_reasons,
-            cc::MainThreadScrollingReason::kMaxNonTransientScrollingReason);
+            cc::MainThreadScrollingReason::kMaxNonTransientScrollingReasons);
   layer_->AddMainThreadScrollingReasons(main_thread_scrolling_reasons);
 }