Rename GrStencilBuffer to GrStencilAttachment

src/gpu/GrStencilBuffer.cpp

Index: src/gpu/GrStencilBuffer.cpp
diff --git a/src/gpu/GrStencilBuffer.cpp b/src/gpu/GrStencilBuffer.cpp
deleted file mode 100644
index 3f2b28f50195663605246a3b98e2a88d3fb4dd56..0000000000000000000000000000000000000000
--- a/src/gpu/GrStencilBuffer.cpp
+++ /dev/null
@@ -1,19 +0,0 @@
-
-/*
- * Copyright 2011 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#include "GrStencilBuffer.h"
-#include "GrResourceKey.h"
-
-void GrStencilBuffer::ComputeSharedStencilBufferKey(int width, int height, int sampleCnt,
-                                                    GrUniqueKey* key) {
-    static const GrUniqueKey::Domain kDomain = GrUniqueKey::GenerateDomain();
-    GrUniqueKey::Builder builder(key, kDomain, 3);
-    builder[0] = width;
-    builder[1] = height;
-    builder[2] = sampleCnt;
-}