[InputEvent] Support |deleteByDrag| and |insertFromDrop|

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

Index: third_party/WebKit/Source/core/editing/EditingUtilities.cpp
diff --git a/third_party/WebKit/Source/core/editing/EditingUtilities.cpp b/third_party/WebKit/Source/core/editing/EditingUtilities.cpp
index 89c8fd5ea9dce1af5bf5a9611648c253199e9969..0682bdfbb4d82d7be707f5c038f1b7bc10810ca7 100644
--- a/third_party/WebKit/Source/core/editing/EditingUtilities.cpp
+++ b/third_party/WebKit/Source/core/editing/EditingUtilities.cpp
@@ -1863,8 +1863,6 @@ DispatchEventResult dispatchBeforeInputInsertText(EventTarget* target, const Str
         return DispatchEventResult::NotCanceled;
     if (!target)
         return DispatchEventResult::NotCanceled;
-    // TODO(chongz): Pass appreciate |ranges| after it's defined on spec.
-    // http://w3c.github.io/editing/input-events.html#dom-inputevent-inputtype
     InputEvent* beforeInputEvent = InputEvent::createBeforeInput(InputEvent::InputType::InsertText, data, InputEvent::EventCancelable::IsCancelable, InputEvent::EventIsComposing::NotComposing, nullptr);
     return target->dispatchEvent(beforeInputEvent);
 }
@@ -1875,7 +1873,7 @@ DispatchEventResult dispatchBeforeInputFromComposition(EventTarget* target, Inpu
         return DispatchEventResult::NotCanceled;
     if (!target)
         return DispatchEventResult::NotCanceled;
-    // TODO(chongz): Pass appreciate |ranges| after it's defined on spec.
+    // TODO(chongz): Pass appreciate |ranges| after it's defined on spec. e.g. For |DeleteComposedCharacterBackward|.
     // http://w3c.github.io/editing/input-events.html#dom-inputevent-inputtype
     InputEvent* beforeInputEvent = InputEvent::createBeforeInput(inputType, data, cancelable, InputEvent::EventIsComposing::IsComposing, nullptr);
     return target->dispatchEvent(beforeInputEvent);