Rename GrStencilBuffer to GrStencilAttachment

src/gpu/gl/GrGLStencilBuffer.cpp

-/*
- * 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 "GrGLStencilBuffer.h"
-#include "GrGLGpu.h"
-
-size_t GrGLStencilBuffer::onGpuMemorySize() const {
-    uint64_t size = this->width();
-    size *= this->height();
-    size *= fFormat.fTotalBits;
-    size *= SkTMax(1,this->numSamples());
-    return static_cast<size_t>(size / 8);
-}
-
-void GrGLStencilBuffer::onRelease() {
-    if (0 != fRenderbufferID && !this->isWrapped()) {
-        GrGLGpu* gpuGL = (GrGLGpu*) this->getGpu();
-        const GrGLInterface* gl = gpuGL->glInterface();
-        GR_GL_CALL(gl, DeleteRenderbuffers(1, &fRenderbufferID));
-        fRenderbufferID = 0;
-    }
-
-    INHERITED::onRelease();
-}
-
-void GrGLStencilBuffer::onAbandon() {
-    fRenderbufferID = 0;
-
-    INHERITED::onAbandon();
-}