Delay instantiating InputDeviceCapabilities until accessed.

third_party/WebKit/Source/core/input/GestureManager.cpp

 // 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.
 
 #include "core/input/GestureManager.h"
 
 #include "core/dom/Document.h"
 #include "core/dom/DocumentUserGestureToken.h"
 #include "core/editing/SelectionController.h"
 #include "core/events/GestureEvent.h"
@@ skipping 198 matching lines @@
   if (!m_suppressMouseEventsFromGestures) {
     m_mouseEventManager->setClickCount(gestureEvent.tapCount());
 
     mouseDownEventResult =
         m_mouseEventManager->setMousePositionAndDispatchMouseEvent(
             currentHitTest.innerNode(), currentHitTest.canvasRegionId(),
             EventTypeNames::mousedown, fakeMouseDown);
     m_selectionController->initializeSelectionState();
     if (mouseDownEventResult == WebInputEventResult::NotHandled) {
       mouseDownEventResult = m_mouseEventManager->handleMouseFocus(
-          currentHitTest, m_frame->document()
-                              ->domWindow()
-                              ->getInputDeviceCapabilities()
-                              ->firesTouchEvents(true));
+          currentHitTest, InputDeviceCapabilities::FiresTouchEvents);
     }
     if (mouseDownEventResult == WebInputEventResult::NotHandled) {
       mouseDownEventResult = m_mouseEventManager->handleMousePressEvent(
           MouseEventWithHitTestResults(fakeMouseDown, currentHitTest));
     }
   }
 
   if (currentHitTest.innerNode()) {
     DCHECK(gestureEvent.type() == WebInputEvent::GestureTap);
     HitTestResult result = currentHitTest;
@@ skipping 158 matching lines @@
           WebInputEvent::IsCompatibilityEventForTouch),
       gestureEvent.timeStampSeconds());
 
   if (!m_suppressMouseEventsFromGestures && m_frame->view()) {
     HitTestRequest request(HitTestRequest::Active);
     LayoutPoint documentPoint = m_frame->view()->rootFrameToContents(
         flooredIntPoint(targetedEvent.event().positionInRootFrame()));
     MouseEventWithHitTestResults mev =
         m_frame->document()->performMouseEventHitTest(request, documentPoint,
                                                       mouseEvent);
-    m_mouseEventManager->handleMouseFocus(mev.hitTestResult(),
-                                          m_frame->document()
-                                              ->domWindow()
-                                              ->getInputDeviceCapabilities()
-                                              ->firesTouchEvents(true));
+    m_mouseEventManager->handleMouseFocus(
+        mev.hitTestResult(), InputDeviceCapabilities::FiresTouchEvents);
   }
   return m_frame->eventHandler().sendContextMenuEvent(mouseEvent);
 }
 
 WebInputEventResult GestureManager::handleGestureShowPress() {
   m_lastShowPressTimestamp = TimeTicks::Now();
 
   FrameView* view = m_frame->view();
   if (!view)
     return WebInputEventResult::NotHandled;
@@ skipping 16 matching lines @@
 
   return &m_frame->page()->frameHost();
 }
 
 WTF::Optional<WTF::TimeTicks> GestureManager::getLastShowPressTimestamp()
     const {
   return m_lastShowPressTimestamp;
 }
 
 }  // namespace blink