diff -r 000000000000 -r 6474c204b198 gfx/skia/trunk/src/gpu/gl/GrGLBufferImpl.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gfx/skia/trunk/src/gpu/gl/GrGLBufferImpl.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,60 @@
+/*
+ * Copyright 2013 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef GrGLBufferImpl_DEFINED
+#define GrGLBufferImpl_DEFINED
+
+#include "SkTypes.h"
+#include "gl/GrGLFunctions.h"
+
+class GrGpuGL;
+
+/**
+ * This class serves as the implementation of GrGL*Buffer classes. It was written to avoid code
+ * duplication in those classes.
+ */
+class GrGLBufferImpl : public SkNoncopyable {
+public:
+    struct Desc {
+        bool        fIsWrapped;
+        GrGLuint    fID;            // set to 0 to indicate buffer is CPU-backed and not a VBO.
+        size_t      fSizeInBytes;
+        bool        fDynamic;
+    };
+
+    GrGLBufferImpl(GrGpuGL*, const Desc&, GrGLenum bufferType);
+    ~GrGLBufferImpl() {
+        // either release or abandon should have been called by the owner of this object.
+        SkASSERT(0 == fDesc.fID);
+    }
+
+    void abandon();
+    void release(GrGpuGL* gpu);
+
+    GrGLuint bufferID() const { return fDesc.fID; }
+    size_t baseOffset() const { return reinterpret_cast<size_t>(fCPUData); }
+
+    void bind(GrGpuGL* gpu) const;
+
+    void* lock(GrGpuGL* gpu);
+    void* lockPtr() const { return fLockPtr; }
+    void unlock(GrGpuGL* gpu);
+    bool isLocked() const;
+    bool updateData(GrGpuGL* gpu, const void* src, size_t srcSizeInBytes);
+
+private:
+    void validate() const;
+
+    Desc         fDesc;
+    GrGLenum     fBufferType; // GL_ARRAY_BUFFER or GL_ELEMENT_ARRAY_BUFFER
+    void*        fCPUData;
+    void*        fLockPtr;
+
+    typedef SkNoncopyable INHERITED;
+};
+
+#endif