Improving direction-based selection strategy.

Source/web/WebLocalFrameImpl.cpp

 /*
  * Copyright (C) 2009 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 1231 matching lines @@
 }
 
 void WebLocalFrameImpl::selectRange(const WebRange& webRange)
 {
     if (RefPtrWillBeRawPtr<Range> range = static_cast<PassRefPtrWillBeRawPtr<Range>>(webRange))
         frame()->selection().setSelectedRange(range.get(), VP_DEFAULT_AFFINITY, FrameSelection::NonDirectional, NotUserTriggered);
 }
 
 void WebLocalFrameImpl::moveRangeSelectionExtent(const WebPoint& point)
 {
-    frame()->selection().moveRangeSelectionExtent(visiblePositionForViewportPoint(point));
+    frame()->selection().moveRangeSelectionExtent(frame()->view()->viewportToContents(point));
 }
 
 void WebLocalFrameImpl::moveRangeSelection(const WebPoint& baseInViewport, const WebPoint& extentInViewport, WebFrame::TextGranularity granularity)
 {
     blink::TextGranularity blinkGranularity = blink::CharacterGranularity;
     if (granularity == WebFrame::WordGranularity)
         blinkGranularity = blink::WordGranularity;
     frame()->selection().moveRangeSelection(
         visiblePositionForViewportPoint(baseInViewport),
         visiblePositionForViewportPoint(extentInViewport),
@@ skipping 827 matching lines @@
 {
     m_frameWidget = frameWidget;
 }
 
 WebFrameWidgetImpl* WebLocalFrameImpl::frameWidget() const
 {
     return m_frameWidget;
 }
 
 } // namespace blink