Make GrPaint have a variable sized array of color and coverage stages rather than a fixed size.

src/gpu/GrAAHairLinePathRenderer.cpp

Index: src/gpu/GrAAHairLinePathRenderer.cpp
diff --git a/src/gpu/GrAAHairLinePathRenderer.cpp b/src/gpu/GrAAHairLinePathRenderer.cpp
index 51bff1efc361dfdb33d7509c94b48198c88bbb7a..bdbc198082592ba261caf191859bec13aa4cb1db 100644
--- a/src/gpu/GrAAHairLinePathRenderer.cpp
+++ b/src/gpu/GrAAHairLinePathRenderer.cpp
@@ -833,12 +833,6 @@ bool GrAAHairLinePathRenderer::onDrawPath(const SkPath& path,
     // TODO: See whether rendering lines as degenerate quads improves perf
     // when we have a mix
 
-    enum {
-        // the edge effects share this stage with glyph rendering
-        // (kGlyphMaskStage in GrTextContext) && SW path rendering
-        // (kPathMaskStage in GrSWMaskHelper)
-        kEdgeEffectStage = GrPaint::kTotalStages,
-    };
     static const int kEdgeAttrIndex = 1;
 
     GrEffectRef* hairLineEffect = HairLineEdgeEffect::Create();