Removed GrClip & related classes

http://codereview.appspot.com/6450071/



git-svn-id: http://skia.googlecode.com/svn/trunk@4899 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/gpu/GrStencil.cpp b/src/gpu/GrStencil.cpp
index ac2d6d8..decfd2d 100644
--- a/src/gpu/GrStencil.cpp
+++ b/src/gpu/GrStencil.cpp
@@ -195,7 +195,7 @@
 // only modify the in/out status of samples covered by the clip element.
 
 // this one only works if used right after stencil clip was cleared.
-// Our GrClip doesn't allow midstream replace ops.
+// Our clip mask creation code doesn't allow midstream replace ops.
 GR_STATIC_CONST_SAME_STENCIL(gReplaceClip,
     kReplace_StencilOp,
     kReplace_StencilOp,