Fix frame coordinate translation issue with scroll views.

third_party/WebKit/Source/web/WebPluginContainerImpl.cpp

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  * Copyright (C) 2014 Opera Software ASA. 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.
@@ skipping 743 matching lines @@
       static_cast<WebDragOperationsMask>(dataTransfer->sourceOperation());
   WebPoint dragScreenLocation(event->screenX(), event->screenY());
   WebPoint dragLocation(event->absoluteLocation().x() - location().x(),
                         event->absoluteLocation().y() - location().y());
 
   m_webPlugin->handleDragStatusUpdate(dragStatus, dragData, dragOperationMask,
                                       dragLocation, dragScreenLocation);
 }
 
 void WebPluginContainerImpl::handleWheelEvent(WheelEvent* event) {
-  WebFloatPoint absoluteRootFrameLocation =
-      event->nativeEvent().positionInRootFrame();
+  WebFloatPoint absoluteLocation = event->nativeEvent().positionInRootFrame();
+  FrameView* view = toFrameView(parent());
+  // Translate the root frame position to content coordinates.
+  if (view) {
+    absoluteLocation = view->rootFrameToContents(absoluteLocation);
+  }
+
   IntPoint localPoint =
       roundedIntPoint(m_element->layoutObject()->absoluteToLocal(
-          absoluteRootFrameLocation, UseTransforms));
+          absoluteLocation, UseTransforms));
   WebMouseWheelEvent translatedEvent = event->nativeEvent().flattenTransform();
   translatedEvent.x = localPoint.x();
   translatedEvent.y = localPoint.y();
 
   WebCursorInfo cursorInfo;
   if (m_webPlugin->handleInputEvent(translatedEvent, cursorInfo) !=
       WebInputEventResult::NotHandled)
     event->setDefaultHandled();
 }
 
@@ skipping 40 matching lines @@
       return;
     case TouchEventRequestTypeRaw: {
       if (!event->nativeEvent())
         return;
 
       if (event->type() == EventTypeNames::touchstart)
         focusPlugin();
 
       WebTouchEvent transformedEvent = event->nativeEvent()->flattenTransform();
 
+      FrameView* view = toFrameView(parent());
+
       for (unsigned i = 0; i < transformedEvent.touchesLength; ++i) {
-        WebFloatPoint absoluteRootFrameLocation =
-            transformedEvent.touches[i].position;
+        WebFloatPoint absoluteLocation = transformedEvent.touches[i].position;
+        // Translate the root frame position to content coordinates.
+        if (view) {
+          absoluteLocation = view->rootFrameToContents(absoluteLocation);
+        }
         IntPoint localPoint =
             roundedIntPoint(m_element->layoutObject()->absoluteToLocal(
-                absoluteRootFrameLocation, UseTransforms));
+                absoluteLocation, UseTransforms));
         transformedEvent.touches[i].position.x = localPoint.x();
         transformedEvent.touches[i].position.y = localPoint.y();
       }
 
       WebCursorInfo cursorInfo;
       if (m_webPlugin->handleInputEvent(transformedEvent, cursorInfo) !=
           WebInputEventResult::NotHandled)
         event->setDefaultHandled();
       // FIXME: Can a plugin change the cursor from a touch-event callback?
       return;
@@ skipping 141 matching lines @@
     // frame view.
     computeClipRectsForPlugin(m_element, windowRect, clipRect, unobscuredRect);
   }
   getPluginOcclusions(m_element, this->parent(), frameRect(), cutOutRects);
   // Convert to the plugin position.
   for (size_t i = 0; i < cutOutRects.size(); i++)
     cutOutRects[i].move(-frameRect().x(), -frameRect().y());
 }
 
 }  // namespace blink