Use ShadowData in DropShadowFilterOperation

third_party/WebKit/Source/core/style/ShadowData.h

Index: third_party/WebKit/Source/core/style/ShadowData.h
diff --git a/third_party/WebKit/Source/core/style/ShadowData.h b/third_party/WebKit/Source/core/style/ShadowData.h
index 390fdf33f591c4e04c5f481735fb85db8282f842..eb83deb0764d2d6dad0aab57da8c8b351d4c6c55 100644
--- a/third_party/WebKit/Source/core/style/ShadowData.h
+++ b/third_party/WebKit/Source/core/style/ShadowData.h
@@ -36,7 +36,7 @@ namespace blink {
 enum ShadowStyle { Normal, Inset };
 
 // This class holds information about shadows for the text-shadow and box-shadow
-// properties.
+// properties, as well as the drop-shadow(...) filter operation.
 class ShadowData {
   USING_FAST_MALLOC(ShadowData);
 
@@ -58,6 +58,7 @@ class ShadowData {
   ShadowData blend(const ShadowData& from,
                    double progress,
                    const Color& currentColor) const;
+  static ShadowData neutralValue();
 
   float x() const { return m_location.x(); }
   float y() const { return m_location.y(); }
@@ -67,6 +68,8 @@ class ShadowData {
   ShadowStyle style() const { return m_style; }
   StyleColor color() const { return m_color; }
 
+  void overrideColor(Color color) { m_color = StyleColor(color); }
+
   // Outsets needed to adjust a source rectangle to the one cast by this
   // shadow.
   FloatRectOutsets rectOutsets() const {