Revert of [InputEvent] Remove unused |inputType()| from |UndoStep| and |EditCommandComposition|

third_party/WebKit/Source/core/editing/commands/CompositeEditCommand.h

Index: third_party/WebKit/Source/core/editing/commands/CompositeEditCommand.h
diff --git a/third_party/WebKit/Source/core/editing/commands/CompositeEditCommand.h b/third_party/WebKit/Source/core/editing/commands/CompositeEditCommand.h
index f6c2930ffa5ed34bbca22557c192a8fac3e8c561..39ffedf1bb80c08f6a62ab4ebd3e10edd2c36d17 100644
--- a/third_party/WebKit/Source/core/editing/commands/CompositeEditCommand.h
+++ b/third_party/WebKit/Source/core/editing/commands/CompositeEditCommand.h
@@ -48,11 +48,13 @@
  public:
   static EditCommandComposition* create(Document*,
                                         const VisibleSelection&,
-                                        const VisibleSelection&);
+                                        const VisibleSelection&,
+                                        InputEvent::InputType);
 
   bool belongsTo(const LocalFrame&) const override;
   void unapply(EditCommandSource) override;
   void reapply(EditCommandSource) override;
+  InputEvent::InputType inputType() const override;
   void append(SimpleEditCommand*);
   void append(EditCommandComposition*);
 
@@ -74,7 +76,8 @@
  private:
   EditCommandComposition(Document*,
                          const VisibleSelection& startingSelection,
-                         const VisibleSelection& endingSelection);
+                         const VisibleSelection& endingSelection,
+                         InputEvent::InputType);
 
   // TODO(chongz): Implement "beforeinput" as described below:
   // Fires "beforeinput" and will returns |false| to cancel unapply / reapply if
@@ -90,6 +93,7 @@
   HeapVector<Member<SimpleEditCommand>> m_commands;
   Member<Element> m_startingRootEditableElement;
   Member<Element> m_endingRootEditableElement;
+  InputEvent::InputType m_inputType;
 };
 
 class CORE_EXPORT CompositeEditCommand : public EditCommand {