Fire accessibility hover events when the touch exploration flag is set.

third_party/WebKit/Source/web/WebViewImpl.cpp

 /*
  * Copyright (C) 2011, 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 2068 matching lines @@
         return true;
 
     if (m_devToolsEmulator->handleInputEvent(inputEvent))
         return true;
 
     if (InspectorOverlay* overlay = inspectorOverlay()) {
         if (overlay->handleInputEvent(inputEvent))
             return true;
     }
 
+    if (inputEvent.modifiers & WebInputEvent::IsTouchAccessibility
+        && WebInputEvent::isMouseEventType(inputEvent.type)) {
+        PlatformMouseEventBuilder pme(mainFrameImpl()->frameView(), static_cast<const WebMouseEvent&>(inputEvent));
+
+        // Find the right target frame. See issue 1186900.
+        HitTestResult result = hitTestResultForRootFramePos(pme.position());
+        Frame* targetFrame;
+        if (result.innerNodeOrImageMapImage())
+            targetFrame = result.innerNodeOrImageMapImage()->document().frame();
+        else
+            targetFrame = m_page->focusController().focusedOrMainFrame();
+
+        if (targetFrame->isLocalFrame()) {
+            LocalFrame* targetLocalFrame = toLocalFrame(targetFrame);
+            Document* document = targetLocalFrame->document();
+            if (document) {
+                AXObjectCache* cache = document->existingAXObjectCache();
+                if (cache)
+                    cache->onTouchAccessibilityHover(pme.position());
+            }
+        }
+    }
+
     // Report the event to be NOT processed by WebKit, so that the browser can handle it appropriately.
     if (m_ignoreInputEvents)
         return false;
 
     TemporaryChange<const WebInputEvent*> currentEventChange(m_currentInputEvent, &inputEvent);
     UIEventWithKeyState::clearNewTabModifierSetFromIsolatedWorld();
 
     if (isPointerLocked() && WebInputEvent::isMouseEventType(inputEvent.type)) {
         pointerLockMouseEvent(inputEvent);
         return true;
@@ skipping 2330 matching lines @@
     if (m_pageColorOverlay)
         m_pageColorOverlay->update();
     if (InspectorOverlay* overlay = inspectorOverlay()) {
         PageOverlay* inspectorPageOverlay = overlay->pageOverlay();
         if (inspectorPageOverlay)
             inspectorPageOverlay->update();
     }
 }
 
 } // namespace blink