Initial CL to move color / coverage off of drawstate

gm/texturedomaineffect.cpp

Index: gm/texturedomaineffect.cpp
diff --git a/gm/texturedomaineffect.cpp b/gm/texturedomaineffect.cpp
index efa753183a73a28a3075d2557b2080a3fe9d2267..beb98b6dd3207d4d36fc44bf5598218c04ff7044 100644
--- a/gm/texturedomaineffect.cpp
+++ b/gm/texturedomaineffect.cpp
@@ -132,10 +132,9 @@ protected:
                     viewMatrix.setTranslate(x, y);
                     GrDrawState drawState(viewMatrix);
                     drawState.setRenderTarget(rt);
-                    drawState.setColor(0xffffffff);
                     drawState.addColorProcessor(fp);
 
-                    tt.target()->drawSimpleRect(&drawState, renderRect);
+                    tt.target()->drawSimpleRect(&drawState, GrColor_WHITE, renderRect);
                     x += renderRect.width() + kTestPad;
                 }
                 y += renderRect.height() + kTestPad;