command_buffer_gles2: Avoid creating multiple AtExitManagers

gpu/gles2_conform_support/egl/egl.cc

 // Copyright (c) 2012 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.
 
 #include <EGL/egl.h>
 #include <stdint.h>
 
 #include "base/command_line.h"
 #include "base/environment.h"
 #include "base/strings/string_split.h"
@@ skipping 130 matching lines @@
 }
 
 EGLAPI EGLBoolean EGLAPIENTRY eglTerminate(EGLDisplay dpy) {
   EGLint error_code = ValidateDisplay(dpy);
   if (error_code != EGL_SUCCESS)
     return EglError(error_code, EGL_FALSE);
 
   egl::Display* display = static_cast<egl::Display*>(dpy);
   delete display;
 
+  // TODO: EGL specifies that the objects are marked for deletion and they will
+  // remain alive as long as "contexts or surfaces associated with display is
+  // current to any thread".
+  // Currently we delete the display here, and may also call exit handlers.
+
   return EglSuccess(EGL_TRUE);
 }
 
 EGLAPI const char* EGLAPIENTRY eglQueryString(EGLDisplay dpy, EGLint name) {
   EGLint error_code = ValidateDisplay(dpy);
   if (error_code != EGL_SUCCESS)
     return EglError(error_code, static_cast<const char*>(NULL));
 
   switch (name) {
     case EGL_CLIENT_APIS:
@@ skipping 292 matching lines @@
   return EGL_FALSE;
 }
 
 /* Now, define eglGetProcAddress using the generic function ptr. type */
 EGLAPI __eglMustCastToProperFunctionPointerType EGLAPIENTRY
 eglGetProcAddress(const char* procname) {
   return reinterpret_cast<__eglMustCastToProperFunctionPointerType>(
       gles2::GetGLFunctionPointer(procname));
 }
 }  // extern "C"