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

third_party/WebKit/Source/core/clipboard/DataTransfer.cpp

Index: third_party/WebKit/Source/core/clipboard/DataTransfer.cpp
diff --git a/third_party/WebKit/Source/core/clipboard/DataTransfer.cpp b/third_party/WebKit/Source/core/clipboard/DataTransfer.cpp
index 168520b05dd5cadee30134088d2e24b969bfcad5..a61d54953e6cc3551853263aa9a042668ca064ab 100644
--- a/third_party/WebKit/Source/core/clipboard/DataTransfer.cpp
+++ b/third_party/WebKit/Source/core/clipboard/DataTransfer.cpp
@@ -322,7 +322,8 @@ void DataTransfer::writeSelection(const FrameSelection& selection) {
   if (!m_dataObject)
     return;
 
-  if (!enclosingTextControl(selection.start())) {
+  if (!enclosingTextControl(
+          selection.computeVisibleSelectionInDOMTreeDeprecated().start())) {
     m_dataObject->setHTMLAndBaseURL(selection.selectedHTMLForClipboard(),
                                     selection.frame()->document()->url());
   }