Delay instantiating InputDeviceCapabilities until accessed.

third_party/WebKit/Source/core/page/FocusController.h

Index: third_party/WebKit/Source/core/page/FocusController.h
diff --git a/third_party/WebKit/Source/core/page/FocusController.h b/third_party/WebKit/Source/core/page/FocusController.h
index fbe594a847e5c0952411e8b36499b3e98e00ed01..73a9c998ffca93cd4ea6a88bc0c3f105fdd9e591 100644
--- a/third_party/WebKit/Source/core/page/FocusController.h
+++ b/third_party/WebKit/Source/core/page/FocusController.h
@@ -27,6 +27,7 @@
 #define FocusController_h
 
 #include "core/CoreExport.h"
+#include "core/input/InputDeviceCapabilities.h"
 #include "platform/geometry/LayoutRect.h"
 #include "platform/heap/Handle.h"
 #include "public/platform/WebFocusType.h"
@@ -43,7 +44,6 @@ class Element;
 class FocusChangedObserver;
 class Frame;
 class HTMLFrameOwnerElement;
-class InputDeviceCapabilities;
 class LocalFrame;
 class Node;
 class Page;
@@ -73,14 +73,15 @@ class CORE_EXPORT FocusController final
 
   bool setInitialFocus(WebFocusType);
   bool advanceFocus(WebFocusType type,
-                    InputDeviceCapabilities* sourceCapabilities = nullptr) {
+                    const InputDeviceCapabilitiesValue& sourceCapabilities =
+                        InputDeviceCapabilitiesValue()) {
     return advanceFocus(type, false, sourceCapabilities);
   }
   bool advanceFocusAcrossFrames(
       WebFocusType,
       RemoteFrame* from,
       LocalFrame* to,
-      InputDeviceCapabilities* sourceCapabilities = nullptr);
+      const InputDeviceCapabilitiesValue& sourceCapabilities);
   Element* findFocusableElementInShadowHost(const Element& shadowHost);
 
   bool setFocusedElement(Element*, Frame*, const FocusParams&);
@@ -105,13 +106,13 @@ class CORE_EXPORT FocusController final
 
   bool advanceFocus(WebFocusType,
                     bool initialFocus,
-                    InputDeviceCapabilities* sourceCapabilities = nullptr);
+                    const InputDeviceCapabilitiesValue&);
   bool advanceFocusDirectionally(WebFocusType);
   bool advanceFocusInDocumentOrder(LocalFrame*,
                                    Element* start,
                                    WebFocusType,
                                    bool initialFocus,
-                                   InputDeviceCapabilities* sourceCapabilities);
+                                   const InputDeviceCapabilitiesValue&);
 
   bool advanceFocusDirectionallyInContainer(Node* container,
                                             const LayoutRect& startingRect,