This CL cleans up the last remaining users of localCoordChange on paint

NOTREECHECKS=True
BUG=skia:

Review URL: https://codereview.chromium.org/817853002
diff --git a/src/gpu/GrBitmapTextContext.h b/src/gpu/GrBitmapTextContext.h
index ad21a2f..f1e6b03 100644
--- a/src/gpu/GrBitmapTextContext.h
+++ b/src/gpu/GrBitmapTextContext.h
@@ -35,6 +35,7 @@
     SkAutoTUnref<const GrFragmentProcessor> fCachedTextureProcessor;
     // Used to check whether fCachedEffect is still valid.
     uint32_t                          fEffectTextureUniqueID;
+    SkMatrix                          fLocalMatrix;
 
     GrBitmapTextContext(GrContext*, const SkDeviceProperties&);