Delay instantiating InputDeviceCapabilities until accessed.

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

Index: third_party/WebKit/Source/core/input/MouseEventManager.cpp
diff --git a/third_party/WebKit/Source/core/input/MouseEventManager.cpp b/third_party/WebKit/Source/core/input/MouseEventManager.cpp
index aaca3de4a6922a173bbbca8e925282d38145c232..3f37ca7b3ad8bd579ce45ac7b7a1351f9914dfeb 100644
--- a/third_party/WebKit/Source/core/input/MouseEventManager.cpp
+++ b/third_party/WebKit/Source/core/input/MouseEventManager.cpp
@@ -19,7 +19,6 @@
 #include "core/html/HTMLCanvasElement.h"
 #include "core/input/EventHandler.h"
 #include "core/input/EventHandlingUtil.h"
-#include "core/input/InputDeviceCapabilities.h"
 #include "core/input/KeyboardEventManager.h"
 #include "core/layout/HitTestResult.h"
 #include "core/layout/api/LayoutViewItem.h"
@@ -395,7 +394,7 @@ Node* MouseEventManager::getNodeUnderMouse() {
 
 WebInputEventResult MouseEventManager::handleMouseFocus(
     const HitTestResult& hitTestResult,
-    InputDeviceCapabilities* sourceCapabilities) {
+    const InputDeviceCapabilitiesValue& sourceCapabilities) {
   // If clicking on a frame scrollbar, do not mess up with content focus.
   if (hitTestResult.scrollbar() && !m_frame->contentLayoutItem().isNull()) {
     if (hitTestResult.scrollbar()->getScrollableArea() ==
@@ -488,7 +487,8 @@ bool MouseEventManager::slideFocusOnShadowHostIfNecessary(
       // Use WebFocusTypeForward instead of WebFocusTypeMouse here to mean the
       // focus has slided.
       found->focus(FocusParams(SelectionBehaviorOnFocus::Reset,
-                               WebFocusTypeForward, nullptr));
+                               WebFocusTypeForward,
+                               InputDeviceCapabilities::Null));
       return true;
     }
   }