Create GestureManager class and move related logic

third_party/WebKit/Source/core/input/KeyboardEventManager.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef KeyboardEventManager_h
 #define KeyboardEventManager_h
 
 #include "core/CoreExport.h"
 #include "platform/PlatformEvent.h"
 #include "platform/heap/Handle.h"
 #include "platform/heap/Visitor.h"
 #include "public/platform/WebFocusType.h"
 #include "public/platform/WebInputEventResult.h"
 #include "wtf/Allocator.h"
 
 namespace blink {
 
 class KeyboardEvent;
 class LocalFrame;
 class PlatformKeyboardEvent;
 class ScrollManager;
 
 class CORE_EXPORT KeyboardEventManager {
     WTF_MAKE_NONCOPYABLE(KeyboardEventManager);
     DISALLOW_NEW();
 public:
-    explicit KeyboardEventManager(LocalFrame*, ScrollManager*);
+    KeyboardEventManager(LocalFrame*, ScrollManager*);
     ~KeyboardEventManager();
     DECLARE_TRACE();
 
     bool handleAccessKey(const PlatformKeyboardEvent&);
     WebInputEventResult keyEvent(const PlatformKeyboardEvent&);
     void defaultKeyboardEventHandler(KeyboardEvent*, Node*);
 
     void capsLockStateMayHaveChanged();
 
 private:
 
     void defaultSpaceEventHandler(KeyboardEvent*, Node*);
     void defaultBackspaceEventHandler(KeyboardEvent*);
     void defaultTabEventHandler(KeyboardEvent*);
     void defaultEscapeEventHandler(KeyboardEvent*);
     void defaultArrowEventHandler(WebFocusType, KeyboardEvent*);
 
     const Member<LocalFrame> m_frame;
 
     ScrollManager* m_scrollManager;
 };
 
 } // namespace blink
 
 #endif // KeyboardEventManager_h