Respect the disabled extension list during binding initialization.

ui/gl/gl_bindings.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #if defined(OS_WIN) || defined(USE_X11) || defined(OS_ANDROID) || defined(USE_OZONE)
 #include <EGL/egl.h>
 #endif
 
 #include "ui/gl/gl_bindings.h"
 
@@ skipping 26 matching lines @@
   }
   return str ? std::string(str) : "";
 }
 #endif
 
 #if defined(OS_WIN) || defined(USE_X11) || defined(OS_ANDROID) || defined(USE_OZONE)
 std::string DriverEGL::GetPlatformExtensions() {
   EGLDisplay display = GLSurfaceEGL::InitializeDisplay();
   if (display == EGL_NO_DISPLAY)
     return "";
-
-  DCHECK(g_driver_egl.fn.eglQueryStringFn);
-  const char* str = g_driver_egl.fn.eglQueryStringFn(display, EGL_EXTENSIONS);
+  const char* str = eglQueryString(display, EGL_EXTENSIONS);
   return str ? std::string(str) : "";
 }
 
 // static
 std::string DriverEGL::GetClientExtensions() {
-  DCHECK(g_driver_egl.fn.eglQueryStringFn);
-  const char* str =
-      g_driver_egl.fn.eglQueryStringFn(EGL_NO_DISPLAY, EGL_EXTENSIONS);
+  const char* str = eglQueryString(EGL_NO_DISPLAY, EGL_EXTENSIONS);
   return str ? std::string(str) : "";
 }
 #endif
 
 #if defined(USE_X11)
 std::string DriverGLX::GetPlatformExtensions() {
   DCHECK(g_driver_glx.fn.glXQueryExtensionsStringFn);
   const char* str =
       g_driver_glx.fn.glXQueryExtensionsStringFn(gfx::GetXDisplay(), 0);
   return str ? std::string(str) : "";
 }
 #endif
 
 }  // namespace gfx