Store null GL context's state in interface object

src/gpu/gl/egl/SkCreatePlatformGLContext_egl.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 "gl/SkGLContext.h"
 
 #include <GLES2/gl2.h>
@@ skipping 211 matching lines @@
 
 void EGLGLContext::destroyEGLImage(GrEGLImage image) const {
     GR_GL_CALL(this->gl(), EGLDestroyImage(fDisplay, image));
 }
 
 GrGLuint EGLGLContext::eglImageToExternalTexture(GrEGLImage image) const {
     GrGLClearErr(this->gl());
     if (!this->gl()->hasExtension("GL_OES_EGL_image_external")) {
         return 0;
     }
-    GrGLEGLImageTargetTexture2DProc glEGLImageTargetTexture2D = 
-            (GrGLEGLImageTargetTexture2DProc) eglGetProcAddress("glEGLImageTargetTexture2DOES");
+    typedef GrGLvoid (*EGLImageTargetTexture2DProc)(GrGLenum, GrGLeglImage);
+
+    EGLImageTargetTexture2DProc glEGLImageTargetTexture2D =
+        (EGLImageTargetTexture2DProc) eglGetProcAddress("glEGLImageTargetTexture2DOES");
     if (!glEGLImageTargetTexture2D) {
         return 0;
     }
     GrGLuint texID;
     glGenTextures(1, &texID);
     if (!texID) {
         return 0;
     }
     glBindTexture(GR_GL_TEXTURE_EXTERNAL, texID);
     if (glGetError() != GR_GL_NO_ERROR) {
@@ skipping 80 matching lines @@
         return nullptr;
     }
     EGLGLContext* ctx = new EGLGLContext(forcedGpuAPI);
     if (!ctx->isValid()) {
         delete ctx;
         return nullptr;
     }
     return ctx;
 }