[InputEvent] Change |getTargetRanges()| to return current selection by default

third_party/WebKit/Source/core/editing/InputMethodController.cpp

Index: third_party/WebKit/Source/core/editing/InputMethodController.cpp
diff --git a/third_party/WebKit/Source/core/editing/InputMethodController.cpp b/third_party/WebKit/Source/core/editing/InputMethodController.cpp
index dd5e4e66636284921fc638683c840c8320d37608..142838fa1fef075bc9d426ebcb37566a6b6d26d3 100644
--- a/third_party/WebKit/Source/core/editing/InputMethodController.cpp
+++ b/third_party/WebKit/Source/core/editing/InputMethodController.cpp
@@ -821,11 +821,10 @@ void InputMethodController::extendSelectionAndDelete(int before, int after) {
     ++before;
   } while (frame().selection().start() == frame().selection().end() &&
            before <= static_cast<int>(selectionOffsets.start()));
-  Range* const range = firstRangeOf(frame().selection().selection());
   // TODO(chongz): Find a way to distinguish Forward and Backward.
-  dispatchBeforeInputEditorCommand(document().focusedElement(),
-                                   InputEvent::InputType::DeleteContentBackward,
-                                   new RangeVector(1, range));
+  dispatchBeforeInputEditorCommand(
+      document().focusedElement(), InputEvent::InputType::DeleteContentBackward,
+      targetRangesForInputEvent(document().focusedElement()));
   TypingCommand::deleteSelection(document());
 }