Change SelectionStartEnd() returning values instead of assigning into ref args.

third_party/WebKit/Source/core/layout/LayoutText.cpp

Index: third_party/WebKit/Source/core/layout/LayoutText.cpp
diff --git a/third_party/WebKit/Source/core/layout/LayoutText.cpp b/third_party/WebKit/Source/core/layout/LayoutText.cpp
index 497a705aced9258dd8cb01c42b35ef0116eb88f7..6ec6ab729ad3b829e9971315c4d6a621e136f2d8 100644
--- a/third_party/WebKit/Source/core/layout/LayoutText.cpp
+++ b/third_party/WebKit/Source/core/layout/LayoutText.cpp
@@ -1559,7 +1559,7 @@ void LayoutText::SetSelectionState(SelectionState state) {
     if (state == SelectionStart || state == SelectionEnd ||
         state == SelectionBoth) {
       int start_pos, end_pos;
-      SelectionStartEnd(start_pos, end_pos);
+      std::tie(start_pos, end_pos) = SelectionStartEnd();
       if (GetSelectionState() == SelectionStart) {
         end_pos = TextLength();
 
@@ -2025,7 +2025,7 @@ LayoutRect LayoutText::LocalSelectionRect() const {
     start_pos = 0;
     end_pos = TextLength();
   } else {
-    SelectionStartEnd(start_pos, end_pos);
+    std::tie(start_pos, end_pos) = SelectionStartEnd();
     if (GetSelectionState() == SelectionStart)
       end_pos = TextLength();
     else if (GetSelectionState() == SelectionEnd)