More carefully disable stages in Ganesh to avoid textures or effects
leaking between draw calls.

http://codereview.appspot.com/6353083/



git-svn-id: http://skia.googlecode.com/svn/trunk@4510 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/gpu/GrTextContext.cpp b/src/gpu/GrTextContext.cpp
index 93ef23d..daf48bf 100644
--- a/src/gpu/GrTextContext.cpp
+++ b/src/gpu/GrTextContext.cpp
@@ -68,7 +68,7 @@
         fMaxVertices = 0;
         fCurrVertex = 0;
         GrSafeSetNull(fCurrTexture);
-        drawState->setTexture(kGlyphMaskStage, NULL);
+        drawState->disableStage(kGlyphMaskStage);
     }
 }