Remove PlatformMouseEvent and use WebMouseEvent instead

third_party/WebKit/Source/core/dom/Document.cpp

Index: third_party/WebKit/Source/core/dom/Document.cpp
diff --git a/third_party/WebKit/Source/core/dom/Document.cpp b/third_party/WebKit/Source/core/dom/Document.cpp
index da5e6752a16732027fc1b61eefd3dd5003721fd2..16c6f1902d77b9aa8f699a2211d6b8c7eb8675b1 100644
--- a/third_party/WebKit/Source/core/dom/Document.cpp
+++ b/third_party/WebKit/Source/core/dom/Document.cpp
@@ -3542,7 +3542,7 @@ ReferrerPolicy Document::getReferrerPolicy() const {
 MouseEventWithHitTestResults Document::performMouseEventHitTest(
     const HitTestRequest& request,
     const LayoutPoint& documentPoint,
-    const PlatformMouseEvent& event) {
+    const WebMouseEvent& event) {
   DCHECK(layoutViewItem().isNull() || layoutViewItem().isLayoutView());
 
   // LayoutView::hitTest causes a layout, and we don't want to hit that until
@@ -3562,15 +3562,13 @@ MouseEventWithHitTestResults Document::performMouseEventHitTest(
     updateHoverActiveState(request, result.innerElement(), result.scrollbar());
 
   if (isHTMLCanvasElement(result.innerNode())) {
-    PlatformMouseEvent eventWithRegion = event;
     HitTestCanvasResult* hitTestCanvasResult =
         toHTMLCanvasElement(result.innerNode())
             ->getControlAndIdIfHitRegionExists(result.pointInInnerNodeFrame());
     if (hitTestCanvasResult->getControl()) {
       result.setInnerNode(hitTestCanvasResult->getControl());
     }
-    eventWithRegion.setRegion(hitTestCanvasResult->getId());
-    return MouseEventWithHitTestResults(eventWithRegion, result);
+    result.setCanvasRegionId(hitTestCanvasResult->getId());
   }
 
   return MouseEventWithHitTestResults(event, result);