Make the Sk GL context class an abstract base class

include/gpu/gl/SkNativeGLContext.h

Index: include/gpu/gl/SkNativeGLContext.h
diff --git a/include/gpu/gl/SkNativeGLContext.h b/include/gpu/gl/SkNativeGLContext.h
deleted file mode 100644
index 93b5b4183ac34794a5cf21c4f288137a346f185c..0000000000000000000000000000000000000000
--- a/include/gpu/gl/SkNativeGLContext.h
+++ /dev/null
@@ -1,111 +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.
- */
-#ifndef SkNativeGLContext_DEFINED
-#define SkNativeGLContext_DEFINED
-
-#include "SkGLContextHelper.h"
-
-/* This struct is taken from a mesa demo.  Please update as required */
-static const struct { int major, minor; } gl_versions[] = {
-   {1, 0},
-   {1, 1},
-   {1, 2},
-   {1, 3},
-   {1, 4},
-   {1, 5},
-   {2, 0},
-   {2, 1},
-   {3, 0},
-   {3, 1},
-   {3, 2},
-   {3, 3},
-   {4, 0},
-   {4, 1},
-   {4, 2},
-   {4, 3},
-   {4, 4},
-   {0, 0} /* end of list */
-};
-#define NUM_GL_VERSIONS SK_ARRAY_COUNT(gl_versions)
-
-#if defined(SK_BUILD_FOR_MAC)
-    #include <OpenGL/OpenGL.h>
-#elif SK_EGL
-    #include <GLES2/gl2.h>
-    #include <EGL/egl.h>
-#elif defined(SK_BUILD_FOR_UNIX)
-    #include <X11/Xlib.h>
-    #include <GL/glx.h>
-#elif defined(SK_BUILD_FOR_WIN32)
-    #include <windows.h>
-    #include <GL/GL.h>
-    #include "SkWGL.h"
-#endif
-
-class SkNativeGLContext : public SkGLContextHelper {
-public:
-    SkNativeGLContext();
-
-    virtual ~SkNativeGLContext();
-
-    virtual void makeCurrent() const SK_OVERRIDE;
-    virtual void swapBuffers() const SK_OVERRIDE;
-
-    class AutoContextRestore {
-    public:
-        AutoContextRestore();
-        ~AutoContextRestore();
-
-    private:
-    #if defined(SK_BUILD_FOR_MAC)
-        CGLContextObj fOldCGLContext;
-    #elif SK_EGL
-        EGLContext fOldEGLContext;
-        EGLDisplay fOldDisplay;
-        EGLSurface fOldSurface;
-    #elif defined(SK_BUILD_FOR_UNIX)
-        GLXContext fOldGLXContext;
-        Display* fOldDisplay;
-        GLXDrawable fOldDrawable;
-    #elif defined(SK_BUILD_FOR_WIN32)
-        HDC fOldHDC;
-        HGLRC fOldHGLRC;
-
-    #elif defined(SK_BUILD_FOR_IOS)
-        void* fEAGLContext;
-    #endif
-    };
-
-protected:
-    virtual const GrGLInterface* createGLContext(GrGLStandard forcedGpuAPI) SK_OVERRIDE;
-    virtual void destroyGLContext() SK_OVERRIDE;
-
-private:
-#if defined(SK_BUILD_FOR_MAC)
-    CGLContextObj fContext;
-#elif SK_EGL
-    EGLContext fContext;
-    EGLDisplay fDisplay;
-    EGLSurface fSurface;
-#elif defined(SK_BUILD_FOR_UNIX)
-    GLXContext fContext;
-    Display* fDisplay;
-    Pixmap fPixmap;
-    GLXPixmap fGlxPixmap;
-#elif defined(SK_BUILD_FOR_WIN32)
-    HWND fWindow;
-    HDC fDeviceContext;
-    HGLRC fGlRenderContext;
-    static ATOM gWC;
-    SkWGLPbufferContext* fPbufferContext;
-#elif defined(SK_BUILD_FOR_IOS)
-    void* fEAGLContext;
-#endif
-};
-
-#endif