Create separate entry points for the various flavors of drawRect

gm/bigrrectaaeffect.cpp

Index: gm/bigrrectaaeffect.cpp
diff --git a/gm/bigrrectaaeffect.cpp b/gm/bigrrectaaeffect.cpp
index 41e4d0565c58add04d47ca9e66e61f32cc0daa66..f603abe27c93af1023e0b6ad87736668bd0f05ee 100644
--- a/gm/bigrrectaaeffect.cpp
+++ b/gm/bigrrectaaeffect.cpp
@@ -85,10 +85,10 @@ protected:
                         bounds.outset(2.f, 2.f);
                         bounds.offset(SkIntToScalar(x), SkIntToScalar(y));
 
-                        tt.target()->drawSimpleRect(pipelineBuilder,
-                                                    0xff000000,
-                                                    SkMatrix::I(),
-                                                    bounds);
+                        tt.target()->drawBWRect(pipelineBuilder,
+                                                0xff000000,
+                                                SkMatrix::I(),
+                                                bounds);
                     }
                 canvas->restore();
                 x = x + kDrawOffset;