Maintain SkPaint in GraphicsContextState.

Source/platform/graphics/Gradient.h

Index: Source/platform/graphics/Gradient.h
diff --git a/Source/platform/graphics/Gradient.h b/Source/platform/graphics/Gradient.h
index 0fa5814555fb552985449762c87e04871aacad40..42a5c68ca163dc684186efdfc294f9a3d514946b 100644
--- a/Source/platform/graphics/Gradient.h
+++ b/Source/platform/graphics/Gradient.h
@@ -72,6 +72,7 @@ public:
     void addColorStop(float, const Color&);
 
     bool hasAlpha() const;
+    bool shaderChanged() const { return m_shaderChanged; }

[f(malita), 2014/03/04 14:23:47]

How about

  return !m_shader?

Gradient already takes care of tracking/invalidating its shader, I think we can
use that.

[Stephen Chennney, 2014/03/04 14:47:10]

Done.

 
     bool isRadial() const { return m_radial; }
     bool isZeroSize() const { return m_p0.x() == m_p1.x() && m_p0.y() == m_p1.y() && (!m_radial || m_r0 == m_r1); }
@@ -135,15 +136,15 @@ private:
 
     void sortStopsIfNecessary();
 
-    // Keep any parameters relevant to rendering in sync with the structure in Gradient::hash().
-    bool m_radial;
     FloatPoint m_p0;
     FloatPoint m_p1;
     float m_r0;
     float m_r1;
     float m_aspectRatio; // For elliptical gradient, width / height.
     mutable Vector<ColorStop, 2> m_stops;
+    bool m_radial;
     mutable bool m_stopsSorted;
+    bool m_shaderChanged;

[f(malita), 2014/03/03 22:46:21]

Looks like we can consolidate these three bools + the one below in a bitfield.

[Stephen Chennney, 2014/03/04 13:20:36]

I missed the odd one at the bottom. So yes.

[Stephen Chennney, 2014/03/04 14:47:10]

Done.

     GradientSpreadMethod m_spreadMethod;
     AffineTransform m_gradientSpaceTransformation;