Add support for converting Colors to linear RGB; Fix relevant filters

Source/platform/graphics/filters/FEDropShadow.cpp

 /*
  * Copyright (C) Research In Motion Limited 2011. All rights reserved.
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * 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,
@@ skipping 70 matching lines @@
         return;
 
     Filter* filter = this->filter();
     FloatSize blurRadius(filter->applyHorizontalScale(m_stdX), filter->applyVerticalScale(m_stdY));
     FloatSize offset(filter->applyHorizontalScale(m_dx), filter->applyVerticalScale(m_dy));
 
     FloatRect drawingRegion = drawingRegionOfInputImage(in->absolutePaintRect());
     GraphicsContext* resultContext = resultImage->context();
     ASSERT(resultContext);
 
-    Color color = m_shadowColor.combineWithAlpha(m_shadowOpacity);
+    Color color = adaptColorToOperatingColorSpace(m_shadowColor.combineWithAlpha(m_shadowOpacity));
     SkAutoTUnref<SkImageFilter> blurFilter(new SkBlurImageFilter(blurRadius.width(), blurRadius.height()));
     SkAutoTUnref<SkColorFilter> colorFilter(SkColorFilter::CreateModeFilter(color.rgb(), SkXfermode::kSrcIn_Mode));
     SkPaint paint;
     paint.setImageFilter(blurFilter.get());
     paint.setColorFilter(colorFilter.get());
     paint.setXfermodeMode(SkXfermode::kSrcOver_Mode);
     RefPtr<Image> image = in->asImageBuffer()->copyImage(DontCopyBackingStore);
 
     RefPtr<NativeImageSkia> nativeImage = image->nativeImageForCurrentFrame();
 
     if (!nativeImage)
         return;
 
     resultContext->drawBitmap(nativeImage->bitmap(), drawingRegion.x() + offset.width(), drawingRegion.y() + offset.height(), &paint);
     resultContext->drawBitmap(nativeImage->bitmap(), drawingRegion.x(), drawingRegion.y());
 }
 
 PassRefPtr<SkImageFilter> FEDropShadow::createImageFilter(SkiaImageFilterBuilder* builder)
 {
     RefPtr<SkImageFilter> input(builder->build(inputEffect(0), operatingColorSpace()));
     float dx = filter()->applyHorizontalScale(m_dx);
     float dy = filter()->applyVerticalScale(m_dy);
     float stdX = filter()->applyHorizontalScale(m_stdX);
     float stdY = filter()->applyVerticalScale(m_stdY);
-    Color color = m_shadowColor.combineWithAlpha(m_shadowOpacity);
+    Color color = adaptColorToOperatingColorSpace(m_shadowColor.combineWithAlpha(m_shadowOpacity));
     SkImageFilter::CropRect cropRect = getCropRect(builder->cropOffset());
     return adoptRef(new SkDropShadowImageFilter(SkFloatToScalar(dx), SkFloatToScalar(dy), SkFloatToScalar(stdX), SkFloatToScalar(stdY), color.rgb(), input.get(), &cropRect));
 }
 
 
 TextStream& FEDropShadow::externalRepresentation(TextStream& ts, int indent) const
 {
     writeIndent(ts, indent);
     ts << "[feDropShadow";
     FilterEffect::externalRepresentation(ts);
     ts << " stdDeviation=\"" << m_stdX << ", " << m_stdY << "\" dx=\"" << m_dx << "\" dy=\"" << m_dy << "\" flood-color=\"" << m_shadowColor.nameForRenderTreeAsText() <<"\" flood-opacity=\"" << m_shadowOpacity << "]\n";
     inputEffect(0)->externalRepresentation(ts, indent + 1);
     return ts;
 }
 
 } // namespace WebCore