Add UseCounter for border-image overriding border-widths

third_party/WebKit/Source/core/paint/NinePieceImagePainter.cpp

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 #include "core/paint/NinePieceImagePainter.h"
 
+#include "core/frame/UseCounter.h"
 #include "core/layout/ImageQualityController.h"
 #include "core/layout/LayoutBoxModelObject.h"
 #include "core/paint/BoxPainter.h"
 #include "core/paint/NinePieceImageGrid.h"
 #include "core/style/ComputedStyle.h"
 #include "core/style/NinePieceImage.h"
 #include "platform/geometry/IntSize.h"
 #include "platform/geometry/LayoutRect.h"
 #include "platform/graphics/GraphicsContext.h"
 
@@ skipping 10 matching lines @@
     StyleImage* styleImage = ninePieceImage.image();
     if (!styleImage)
         return false;
 
     if (!styleImage->isLoaded())
         return true; // Never paint a nine-piece image incrementally, but don't paint the fallback borders either.
 
     if (!styleImage->canRender(m_layoutObject, style.effectiveZoom()))
         return false;
 
+    // Find out if the hasImage() check in ComputedStyle::border*Width had any affect, i.e. if a border is non-zero while border-style is
+    // none or hidden.
+    if ((style.borderLeftWidth() && (style.borderLeft().style() == BNONE || style.borderLeft().style() == BHIDDEN))
+        || (style.borderRightWidth() && (style.borderRight().style() == BNONE || style.borderRight().style() == BHIDDEN))
+        || (style.borderTopWidth() && (style.borderTop().style() == BNONE || style.borderTop().style() == BHIDDEN))
+        || (style.borderBottomWidth() && (style.borderBottom().style() == BNONE || style.borderBottom().style() == BHIDDEN)))
+        UseCounter::count(m_layoutObject.document(), UseCounter::BorderImageWithBorderStyleNone);
+
     // FIXME: border-image is broken with full page zooming when tiling has to happen, since the tiling function
     // doesn't have any understanding of the zoom that is in effect on the tile.
     LayoutRect rectWithOutsets = rect;
     rectWithOutsets.expand(style.imageOutsets(ninePieceImage));
     IntRect borderImageRect = pixelSnappedIntRect(rectWithOutsets);
 
     IntSize imageSize = m_layoutObject.calculateImageIntrinsicDimensions(styleImage, borderImageRect.size(),
         LayoutBoxModelObject::DoNotScaleByEffectiveZoom);
 
     // If both values are 'auto' then the intrinsic width and/or height of the image should be used, if any.
@@ skipping 25 matching lines @@
                     drawInfo.tileRule.vertical, op);
             }
         }
     }
 
     graphicsContext->setImageInterpolationQuality(previousInterpolationQuality);
     return true;
 }
 
 } // namespace blink