Honor the wheel event canScroll bit instead of trying to infer it from the ctrl modifier

Source/platform/scroll/ScrollableArea.cpp

Index: Source/platform/scroll/ScrollableArea.cpp
diff --git a/Source/platform/scroll/ScrollableArea.cpp b/Source/platform/scroll/ScrollableArea.cpp
index 367f42821331120cd81245fa9289770ebf7286a2..c747d10b86fd3e6d0e2a69fdc310103630f8eedf 100644
--- a/Source/platform/scroll/ScrollableArea.cpp
+++ b/Source/platform/scroll/ScrollableArea.cpp
@@ -240,8 +240,8 @@ bool ScrollableArea::scrollBehaviorFromString(const String& behaviorString, Scro
 
 bool ScrollableArea::handleWheelEvent(const PlatformWheelEvent& wheelEvent)
 {
-    // ctrl+wheel events are used to trigger zooming, not scrolling.
-    if (wheelEvent.modifiers() & PlatformEvent::CtrlKey)
+    // Wheel events which do not scroll are used to trigger zooming.
+    if (!wheelEvent.canScroll())
         return false;
 
     cancelProgrammaticScrollAnimation();