Track constant InputDeviceCapabilities objects per-window.

third_party/WebKit/Source/core/frame/DOMWindow.h

 // Copyright 2014 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 DOMWindow_h
 #define DOMWindow_h
 
 #include "bindings/core/v8/Transferables.h"
 #include "core/CoreExport.h"
 #include "core/events/EventTarget.h"
@@ skipping 13 matching lines @@
 class CustomElementRegistry;
 class DOMSelection;
 class DOMVisualViewport;
 class Document;
 class Element;
 class External;
 class FrameRequestCallback;
 class History;
 class IdleRequestCallback;
 class IdleRequestOptions;
+class InputDeviceCapabilitiesConstants;
 class Location;
 class LocalDOMWindow;
 class MessageEvent;
 class MediaQueryList;
 class Navigator;
 class Screen;
 class ScriptState;
 class ScrollToOptions;
 class SerializedScriptValue;
 class StyleMedia;
@@ skipping 205 matching lines @@
                                          webkitAnimationStart);
   DEFINE_MAPPED_ATTRIBUTE_EVENT_LISTENER(webkitanimationiteration,
                                          webkitAnimationIteration);
   DEFINE_MAPPED_ATTRIBUTE_EVENT_LISTENER(webkitanimationend,
                                          webkitAnimationEnd);
   DEFINE_MAPPED_ATTRIBUTE_EVENT_LISTENER(webkittransitionend,
                                          webkitTransitionEnd);
 
   DEFINE_ATTRIBUTE_EVENT_LISTENER(orientationchange);
 
+  InputDeviceCapabilitiesConstants* getInputDeviceCapabilities();
+
  protected:
   explicit DOMWindow(Frame&);
 
   virtual void schedulePostMessage(MessageEvent*,
                                    PassRefPtr<SecurityOrigin> target,
                                    Document* source) = 0;
 
   void disconnectFromFrame() { m_frame = nullptr; }
 
  private:
   Member<Frame> m_frame;
+  Member<InputDeviceCapabilitiesConstants> m_inputCapabilities;
   mutable Member<Location> m_location;
   Member<External> m_external;
 
   // Set to true when close() has been called. Needed for
   // |window.closed| determinism; having it return 'true'
   // only after the layout widget's deferred window close
   // operation has been performed, exposes (confusing)
   // implementation details to scripts.
   bool m_windowIsClosing;
 
 };
 
 }  // namespace blink
 
 #endif  // DOMWindow_h