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 812 matching lines @@
     case kTouchEventRequestTypeRaw: {
       if (!event->NativeEvent())
         return;
 
       if (event->type() == EventTypeNames::touchstart)
         FocusPlugin();
 
       WebTouchEvent transformed_event =
           event->NativeEvent()->FlattenTransform();
 
+      FrameView* view = ToFrameView(Parent());
+
       for (unsigned i = 0; i < transformed_event.touches_length; ++i) {
         WebFloatPoint absolute_root_frame_location =
             transformed_event.touches[i].position;
+
+        // Translate the absolute position to content coordinates.
+        if (view) {
+          absolute_root_frame_location =
+              view->RootFrameToContents(absolute_root_frame_location);
+        }
+
         IntPoint local_point =
             RoundedIntPoint(element_->GetLayoutObject()->AbsoluteToLocal(
                 absolute_root_frame_location, kUseTransforms));
         transformed_event.touches[i].position.x = local_point.X();
         transformed_event.touches[i].position.y = local_point.Y();
       }
 
       WebCursorInfo cursor_info;
       if (web_plugin_->HandleInputEvent(transformed_event, cursor_info) !=
           WebInputEventResult::kNotHandled)
@@ skipping 149 matching lines @@
     ComputeClipRectsForPlugin(element_, window_rect, clip_rect,
                               unobscured_rect);
   }
   GetPluginOcclusions(element_, this->Parent(), FrameRect(), cut_out_rects);
   // Convert to the plugin position.
   for (size_t i = 0; i < cut_out_rects.size(); i++)
     cut_out_rects[i].Move(-FrameRect().X(), -FrameRect().Y());
 }
 
 }  // namespace blink