Support subpixel values for text-shadow and box-shadow

Source/core/rendering/EllipsisBox.cpp

 /**
  * Copyright (C) 2003, 2006 Apple Computer, 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.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 52 matching lines @@
             context->setFillColor(foreground);
     }
 
     // Text shadows are disabled when printing. http://crbug.com/258321
     const ShadowList* shadowList = context->printing() ? 0 : style->textShadow();
     bool hasShadow = shadowList;
     if (hasShadow) {
         DrawLooper drawLooper;
         for (size_t i = shadowList->shadows().size(); i--; ) {
             const ShadowData& shadow = shadowList->shadows()[i];
-            int shadowX = isHorizontal() ? shadow.x() : shadow.y();
-            int shadowY = isHorizontal() ? shadow.y() : -shadow.x();
+            float shadowX = isHorizontal() ? shadow.x() : shadow.y();
+            float shadowY = isHorizontal() ? shadow.y() : -shadow.x();
             FloatSize offset(shadowX, shadowY);
             drawLooper.addShadow(offset, shadow.blur(), m_renderer->resolveColor(shadow.color()),
                 DrawLooper::ShadowRespectsTransforms, DrawLooper::ShadowIgnoresAlpha);
         }
         drawLooper.addUnmodifiedContent();
         context->setDrawLooper(drawLooper);
     }
 
     // FIXME: Why is this always LTR? Fix by passing correct text run flags below.
     TextRun textRun = RenderBlockFlow::constructTextRun(renderer(), font, m_str, style, TextRun::AllowTrailingExpansion);
@@ skipping 96 matching lines @@
     if (visibleToHitTestRequest(request) && boundsRect.intersects(HitTestLocation::rectForPoint(locationInContainer.point(), 0, 0, 0, 0))) {
         renderer()->updateHitTestResult(result, locationInContainer.point() - toLayoutSize(adjustedLocation));
         if (!result.addNodeToRectBasedTestResult(renderer()->node(), request, locationInContainer, boundsRect))
             return true;
     }
 
     return false;
 }
 
 } // namespace WebCore