For flex items, percent paddings should resolve against their respective dimension

Source/core/rendering/RenderThemeChromiumSkia.cpp

 /*
  * Copyright (C) 2007 Apple Inc.
  * Copyright (C) 2007 Alp Toker <alp@atoker.com>
  * Copyright (C) 2008 Collabora Ltd.
  * Copyright (C) 2008, 2009 Google Inc.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 22 matching lines @@
 #include "core/rendering/RenderThemeChromiumFontProvider.h"
 #include "platform/LayoutTestSupport.h"
 #include "platform/graphics/GraphicsContext.h"
 #include "platform/graphics/Image.h"
 #include "platform/scroll/ScrollbarTheme.h"
 #include "wtf/CurrentTime.h"
 #include "wtf/StdLibExtras.h"
 
 namespace blink {
 
-enum PaddingType {
-    TopPadding,
-    RightPadding,
-    BottomPadding,
-    LeftPadding
-};
-
 static const int styledMenuListInternalPadding[4] = { 1, 4, 1, 4 };
 
 // These values all match Safari/Win.
 static const float defaultControlFontPixelSize = 13;
 static const float defaultCancelButtonSize = 9;
 static const float minCancelButtonSize = 5;
 static const float maxCancelButtonSize = 21;
 static const float defaultSearchFieldResultsDecorationSize = 13;
 static const float minSearchFieldResultsDecorationSize = 9;
 static const float maxSearchFieldResultsDecorationSize = 30;
@@ skipping 421 matching lines @@
 }
 
 RenderThemeChromiumSkia::DirectionFlippingScope::~DirectionFlippingScope()
 {
     if (!m_needsFlipping)
         return;
     m_paintInfo.context->restore();
 }
 
 } // namespace blink