Fixed Shadow blur for transparent objects

Source/core/rendering/TextPainter.cpp

 // Copyright 2014 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/rendering/TextPainter.h"
 
 #include "core/CSSPropertyNames.h"
 #include "core/frame/Settings.h"
 #include "core/rendering/InlineTextBox.h"
@@ skipping 78 matching lines @@
         if (textStyle.strokeColor != context->strokeColor())
             context->setStrokeColor(textStyle.strokeColor);
         if (textStyle.strokeWidth != context->strokeThickness())
             context->setStrokeThickness(textStyle.strokeWidth);
     }
 
     // Text shadows are disabled when printing. http://crbug.com/258321
     if (textStyle.shadow && !context->printing()) {
         if (!stateSaver.saved())
             stateSaver.save();
+        context->clearShadow();

[Stephen White, 2014/10/23 19:08:48]

Same here.

[sugoi1, 2014/10/23 20:25:14]

Done.

         context->setDrawLooper(textStyle.shadow->createDrawLooper(DrawLooperBuilder::ShadowIgnoresAlpha, horizontal));
     }
 }
 
 static Color textColorForWhiteBackground(Color textColor)
 {
     int distanceFromWhite = differenceSquared(textColor, Color::white);
     // semi-arbitrarily chose 65025 (255^2) value here after a few tests;
     return distanceFromWhite > 65025 ? textColor : textColor.dark();
 }
@@ skipping 100 matching lines @@
     DEFINE_STATIC_LOCAL(TextRun, placeholderTextRun, (&ideographicFullStop, 1));
     FloatPoint emphasisMarkTextOrigin(m_textBounds.x(), m_textBounds.y() + m_font.fontMetrics().ascent() + m_emphasisMarkOffset);
     TextRunPaintInfo textRunPaintInfo(placeholderTextRun);
     textRunPaintInfo.bounds = m_textBounds;
     m_graphicsContext->concatCTM(InlineTextBox::rotation(m_textBounds, InlineTextBox::Clockwise));
     m_graphicsContext->drawEmphasisMarks(m_combinedText->originalFont(), textRunPaintInfo, m_emphasisMark, emphasisMarkTextOrigin);
     m_graphicsContext->concatCTM(InlineTextBox::rotation(m_textBounds, InlineTextBox::Counterclockwise));
 }
 
 } // namespace blink