Add blink::WebInputEvent::IsPinchGestureEventType().

chrome/browser/ui/app_list/start_page_service.cc

Index: chrome/browser/ui/app_list/start_page_service.cc
diff --git a/chrome/browser/ui/app_list/start_page_service.cc b/chrome/browser/ui/app_list/start_page_service.cc
index 0a1eb6480ace81830294d35fb889382b0c639ff1..be92c2f33b25a5f59b22d9491375b429caf04b75 100644
--- a/chrome/browser/ui/app_list/start_page_service.cc
+++ b/chrome/browser/ui/app_list/start_page_service.cc
@@ -195,9 +195,7 @@ class StartPageService::StartPageWebContentsDelegate
   bool PreHandleGestureEvent(content::WebContents* /*source*/,
                              const blink::WebGestureEvent& event) override {
     // Disable pinch zooming on the start page web contents.
-    return event.GetType() == blink::WebGestureEvent::kGesturePinchBegin ||
-           event.GetType() == blink::WebGestureEvent::kGesturePinchUpdate ||
-           event.GetType() == blink::WebGestureEvent::kGesturePinchEnd;
+    return blink::WebInputEvent::IsPinchGestureEventType(event.GetType());
   }