Cleanup namespace usage in platform/graphics/[filters/* to skia/*] and platform/graphics/[B-D]*

Source/platform/graphics/filters/SkiaImageFilterBuilder.cpp

Index: Source/platform/graphics/filters/SkiaImageFilterBuilder.cpp
diff --git a/Source/platform/graphics/filters/SkiaImageFilterBuilder.cpp b/Source/platform/graphics/filters/SkiaImageFilterBuilder.cpp
index 15fc17645a86f9f9a562eda74b65296096253cae..8c4d6dbc1dc4943292c25555b4927236b57291fb 100644
--- a/Source/platform/graphics/filters/SkiaImageFilterBuilder.cpp
+++ b/Source/platform/graphics/filters/SkiaImageFilterBuilder.cpp
@@ -86,7 +86,7 @@ PassRefPtr<SkImageFilter> SkiaImageFilterBuilder::transformColorSpace(
     return adoptRef(SkColorFilterImageFilter::Create(colorFilter.get(), input));
 }
 
-void SkiaImageFilterBuilder::buildFilterOperations(const FilterOperations& operations, blink::WebFilterOperations* filters)
+void SkiaImageFilterBuilder::buildFilterOperations(const FilterOperations& operations, WebFilterOperations* filters)
 {
     ColorSpace currentColorSpace = ColorSpaceDeviceRGB;
     SkImageFilter* const nullFilter = 0;
@@ -172,7 +172,7 @@ void SkiaImageFilterBuilder::buildFilterOperations(const FilterOperations& opera
         }
         case FilterOperation::DROP_SHADOW: {
             const DropShadowFilterOperation& drop = toDropShadowFilterOperation(op);
-            filters->appendDropShadowFilter(blink::WebPoint(drop.x(), drop.y()), drop.stdDeviation(), drop.color().rgb());
+            filters->appendDropShadowFilter(WebPoint(drop.x(), drop.y()), drop.stdDeviation(), drop.color().rgb());
             break;
         }
         case FilterOperation::NONE:
@@ -191,4 +191,4 @@ PassRefPtr<SkImageFilter> SkiaImageFilterBuilder::buildTransform(const AffineTra
     return adoptRef(SkMatrixImageFilter::Create(affineTransformToSkMatrix(transform), SkPaint::kHigh_FilterLevel, input));
 }
 
-};
+} // namespace blink