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

third_party/WebKit/Source/core/layout/line/InlineTextBox.cpp

Index: third_party/WebKit/Source/core/layout/line/InlineTextBox.cpp
diff --git a/third_party/WebKit/Source/core/layout/line/InlineTextBox.cpp b/third_party/WebKit/Source/core/layout/line/InlineTextBox.cpp
index 2399a9e8338c3bad5295016a67d81c8320b1d863..7cd60044d830c3f81a8b9a3a0444c66f0c44d1e7 100644
--- a/third_party/WebKit/Source/core/layout/line/InlineTextBox.cpp
+++ b/third_party/WebKit/Source/core/layout/line/InlineTextBox.cpp
@@ -138,7 +138,7 @@ SelectionState InlineTextBox::GetSelectionState() const {
   if (state == SelectionStart || state == SelectionEnd ||
       state == SelectionBoth) {
     int start_pos, end_pos;
-    GetLineLayoutItem().SelectionStartEnd(start_pos, end_pos);
+    std::tie(start_pos, end_pos) = GetLineLayoutItem().SelectionStartEnd();
     // The position after a hard line break is considered to be past its end.
     // See the corresponding code in InlineTextBox::isSelected.
     int last_selectable = Start() + Len() - (IsLineBreak() ? 1 : 0);
@@ -502,7 +502,7 @@ void InlineTextBox::SelectionStartEnd(int& s_pos, int& e_pos) const {
     start_pos = 0;
     end_pos = GetLineLayoutItem().TextLength();
   } else {
-    GetLineLayoutItem().SelectionStartEnd(start_pos, end_pos);
+    std::tie(start_pos, end_pos) = GetLineLayoutItem().SelectionStartEnd();
     if (GetLineLayoutItem().GetSelectionState() == SelectionStart)
       end_pos = GetLineLayoutItem().TextLength();
     else if (GetLineLayoutItem().GetSelectionState() == SelectionEnd)