Expand FrameSeleciton::rootEditableElement() to increase chances of hoisting update layout

third_party/WebKit/Source/core/input/EventHandler.cpp

Index: third_party/WebKit/Source/core/input/EventHandler.cpp
diff --git a/third_party/WebKit/Source/core/input/EventHandler.cpp b/third_party/WebKit/Source/core/input/EventHandler.cpp
index 29fe2e47346f6676bf226bbba756bea76c07e88e..a86fbea82aedc64ea728f883d6df4c872c200607 100644
--- a/third_party/WebKit/Source/core/input/EventHandler.cpp
+++ b/third_party/WebKit/Source/core/input/EventHandler.cpp
@@ -1839,7 +1839,8 @@ WebInputEventResult EventHandler::sendContextMenuEventForKey(
   VisualViewport& visualViewport = frameHost()->visualViewport();
 
   if (!overrideTargetElement && start.anchorNode() &&
-      (selection.rootEditableElement() ||
+      (selection.computeVisibleSelectionInDOMTreeDeprecated()
+           .rootEditableElement() ||
        selection.computeVisibleSelectionInDOMTreeDeprecated().isRange())) {
     // TODO(xiaochengh): The use of updateStyleAndLayoutIgnorePendingStylesheets
     // needs to be audited.  See http://crbug.com/590369 for more details.