Refactor SkGLContext to be actually extendable

src/gpu/gl/nacl/SkCreatePlatformGLContext_nacl.cpp

Index: src/gpu/gl/nacl/SkCreatePlatformGLContext_nacl.cpp
diff --git a/src/gpu/gl/nacl/SkCreatePlatformGLContext_nacl.cpp b/src/gpu/gl/nacl/SkCreatePlatformGLContext_nacl.cpp
index 5e4b2e49176b2b5d552dbc35f6dcf8ff5941a208..5cb44238973f115b5f712e5790f37d6149ecc5e8 100644
--- a/src/gpu/gl/nacl/SkCreatePlatformGLContext_nacl.cpp
+++ b/src/gpu/gl/nacl/SkCreatePlatformGLContext_nacl.cpp
@@ -7,54 +7,8 @@
  */
 #include "gl/SkGLContext.h"
 
-#include <GLES2/gl2.h>
-#include <EGL/egl.h>
-
-namespace {
-class NACLGLContext : public SkGLContext  {
-public:
-    SkGLContextEGL();
-
-    virtual ~NACLGLContext();
-
-    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;
-};
-
-NACLGLContext::NACLGLContext()
-    : fContext(NULL)
-    , fDisplay(NULL)
-{
-}
-
-NACLGLContext::~NACLGLContext() {
-    this->destroyGLContext();
-}
-
-void NACLGLContext::destroyGLContext() {
-}
-
-const GrGLInterface* NACLGLContext::createGLContext(GrGLStandard forcedGpuAPI) {
+SkGLContext* SkCreatePlatformGLContext(GrGLStandard forcedGpuAPI) {
     return NULL;
 }
 
-void NACLGLContext::makeCurrent() const {
-}
-
-void NACLGLContext::swapBuffers() const {
-}
-
-} // anonymous namespace
-
-NACLGLContext* SkCreatePlatformGLContext() {
-    return SkNEW(NACLGLContext);
-}