Handle touch accessibility in PageWidgetDelegate instead of WebViewImpl.

third_party/WebKit/Source/web/PageWidgetDelegate.cpp

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 90 matching lines @@
 }
 
 void PageWidgetDelegate::paintIgnoringCompositing(Page& page, WebCanvas* canvas,
     const WebRect& rect, LocalFrame& root)
 {
     paintInternal(page, canvas, rect, root, GlobalPaintFlattenCompositingLayers);
 }
 
 WebInputEventResult PageWidgetDelegate::handleInputEvent(PageWidgetEventHandler& handler, const WebInputEvent& event, LocalFrame* root)
 {
+    if (event.modifiers & WebInputEvent::IsTouchAccessibility
+        && WebInputEvent::isMouseEventType(event.type)) {
+        PlatformMouseEventBuilder pme(root->view(), static_cast<const WebMouseEvent&>(event));
+
+        IntPoint docPoint(root->view()->rootFrameToContents(pme.position()));
+        HitTestResult result = root->eventHandler().hitTestResultAtPoint(docPoint, HitTestRequest::ReadOnly | HitTestRequest::Active);
+        result.setToShadowHostIfInUserAgentShadowRoot();
+        if (result.innerNodeFrame()) {
+            Document* document = result.innerNodeFrame()->document();
+            if (document) {
+                AXObjectCache* cache = document->existingAXObjectCache();
+                if (cache)
+                    cache->onTouchAccessibilityHover(result.roundedPointInInnerNodeFrame());
+            }
+        }
+    }
+
     switch (event.type) {
 
     // FIXME: WebKit seems to always return false on mouse events processing
     // methods. For now we'll assume it has processed them (as we are only
     // interested in whether keyboard events are processed).
     // FIXME: Why do we return HandleSuppressed when there is no root or
     // the root is detached?
     case WebInputEvent::MouseMove:
         if (!root || !root->view())
             return WebInputEventResult::HandledSuppressed;
@@ skipping 132 matching lines @@
         WEBINPUT_EVENT_CASE(TouchEnd)
         WEBINPUT_EVENT_CASE(TouchCancel)
         WEBINPUT_EVENT_CASE(TouchScrollStarted)
     default:
         NOTREACHED();
         return "";
     }
 }
 
 } // namespace blink