Make the Sk GL context class an abstract base class

src/gpu/gl/nacl/SkNativeGLContext_nacl.cpp

Index: src/gpu/gl/nacl/SkNativeGLContext_nacl.cpp
diff --git a/src/gpu/gl/nacl/SkNativeGLContext_nacl.cpp b/src/gpu/gl/nacl/SkNativeGLContext_nacl.cpp
index 334be1d9542abb0b06d9904e8a52ba66bb5e15cc..5901aa87ea99a09018e7969cbde7a74bb3e34a3d 100644
--- a/src/gpu/gl/nacl/SkNativeGLContext_nacl.cpp
+++ b/src/gpu/gl/nacl/SkNativeGLContext_nacl.cpp
@@ -5,33 +5,56 @@
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
-#include "gl/SkNativeGLContext.h"
+#include "gl/SkGLContext.h"
 
-SkNativeGLContext::AutoContextRestore::AutoContextRestore() {
-}
+#include <GLES2/gl2.h>
+#include <EGL/egl.h>
 
-SkNativeGLContext::AutoContextRestore::~AutoContextRestore() {
-}
+namespace {
+class SkGLContextNACL : public SkGLContext  {
+public:
+    SkGLContextEGL();
+
+    virtual ~SkGLContextNACL();
+
+    virtual void makeCurrent() const SK_OVERRIDE;
+    virtual void swapBuffers() const SK_OVERRIDE;
+protected:
+    virtual const GrGLInterface* createGLContext(GrGLStandard forcedGpuAPI) SK_OVERRIDE;
+    virtual void destroyGLContext() SK_OVERRIDE;
+
+private:
+    EGLContext fContext;
+    EGLDisplay fDisplay;
+    EGLSurface fSurface;
+};
 
-SkNativeGLContext::SkNativeGLContext()
+SkGLContextNACL::SkGLContextNACL()
     : fContext(NULL)
     , fDisplay(NULL)
 {
 }
 
-SkNativeGLContext::~SkNativeGLContext() {
+SkGLContextNACL::~SkGLContextNACL() {
     this->destroyGLContext();
 }
 
-void SkNativeGLContext::destroyGLContext() {
+void SkGLContextNACL::destroyGLContext() {
 }
 
-const GrGLInterface* SkNativeGLContext::createGLContext(GrGLStandard forcedGpuAPI) {
+const GrGLInterface* SkGLContextNACL::createGLContext(GrGLStandard forcedGpuAPI) {
     return NULL;
 }
 
-void SkNativeGLContext::makeCurrent() const {
+void SkGLContextNACL::makeCurrent() const {
 }
 
-void SkNativeGLContext::swapBuffers() const {
+void SkGLContextNACL::swapBuffers() const {
 }
+
+} // anonymous namespace
+
+SkGLContextNACL* SkCreateGLContext() {
+    return SkNEW(SkGLContextNACL);
+}
+