Add effect caching to distance field text.

src/gpu/GrDistanceFieldTextContext.h

Index: src/gpu/GrDistanceFieldTextContext.h
diff --git a/src/gpu/GrDistanceFieldTextContext.h b/src/gpu/GrDistanceFieldTextContext.h
index 7676fc16482b63e7163e5e661177d15142cd068e..4b472f4c60fc68e14967a0a5d48e30e9da488a7a 100644
--- a/src/gpu/GrDistanceFieldTextContext.h
+++ b/src/gpu/GrDistanceFieldTextContext.h
@@ -34,6 +34,11 @@ private:
     SkScalar                fTextRatio;
     bool                    fUseLCDText;
     bool                    fEnableDFRendering;

[robertphillips, 2014/07/29 14:01:06]

Weak suggestion: wrap this in a nameless struct?

[jvanverth1, 2014/07/29 14:43:41]

Weakly ignored. :)

+    SkAutoTUnref<GrEffect>  fCachedEffect;
+    // Used to check whether fCachedEffect is still valid.
+    uint32_t                fEffectTextureUniqueID;
+    SkColor                 fEffectColor;
+    uint32_t                fEffectFlags;
     GrTexture*              fGammaTexture;
 
     void init(const GrPaint&, const SkPaint&);