Split drawing functionality out of GrContext and into new GrDrawContext

src/gpu/GrSWMaskHelper.cpp

Index: src/gpu/GrSWMaskHelper.cpp
diff --git a/src/gpu/GrSWMaskHelper.cpp b/src/gpu/GrSWMaskHelper.cpp
index 223f62fd954d39079a847275cf94328c278f8ad5..d0dd3de4597ae7175b2106b0b0320b7e9a667b75 100644
--- a/src/gpu/GrSWMaskHelper.cpp
+++ b/src/gpu/GrSWMaskHelper.cpp
@@ -376,5 +376,5 @@ void GrSWMaskHelper::DrawToTargetWithPathMask(GrTexture* texture,
                                                        GrTextureParams::kNone_FilterMode,
                                                        kDevice_GrCoordSet))->unref();
 
-    target->drawRect(pipelineBuilder, color, SkMatrix::I(), dstRect, NULL, &invert);
+    target->drawBWRect(pipelineBuilder, color, SkMatrix::I(), dstRect, NULL, &invert);
 }