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

include/gpu/SkGpuDevice.h

Index: include/gpu/SkGpuDevice.h
diff --git a/include/gpu/SkGpuDevice.h b/include/gpu/SkGpuDevice.h
index 0dd363fa36f22489737aec1e000a2d21038a1e8d..b0b15591ca1115f91f54b21231a90ee18588b6c6 100644
--- a/include/gpu/SkGpuDevice.h
+++ b/include/gpu/SkGpuDevice.h
@@ -152,7 +152,6 @@ private:
                                                Usage usage) SK_OVERRIDE;
 
     SkDrawProcs* initDrawForText(GrTextContext*);
-    bool bindDeviceAsTexture(GrPaint* paint);
 
     // sets the render target, clip, and matrix on GrContext. Use forceIdenity to override
     // SkDraw's matrix and draw in device coords.
@@ -178,12 +177,12 @@ private:
                             const SkRect&,
                             const SkMatrix&,
                             const GrTextureParams& params,
-                            GrPaint* grPaint);
+                            const SkPaint& paint);
     void drawTiledBitmap(const SkBitmap& bitmap,
                          const SkRect& srcRect,
                          const SkMatrix& m,
                          const GrTextureParams& params,
-                         GrPaint* grPaint);
+                         const SkPaint& paint);
 
     /**
      * Returns non-initialized instance.