gpu: Add extension check when initializing MailboxSync

gpu/command_buffer/service/texture_definition.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.
 
 #include "gpu/command_buffer/service/texture_definition.h"
 
 #include "gpu/command_buffer/service/texture_manager.h"
 #include "ui/gl/gl_image.h"
 #include "ui/gl/gl_implementation.h"
 #include "ui/gl/scoped_binders.h"
@@ skipping 102 matching lines @@
 
 scoped_refptr<NativeImageBufferEGL> NativeImageBufferEGL::Create(
     GLuint texture_id) {
   EGLDisplay egl_display = gfx::GLSurfaceEGL::GetHardwareDisplay();
   EGLContext egl_context = eglGetCurrentContext();
 
   DCHECK_NE(EGL_NO_CONTEXT, egl_context);
   DCHECK_NE(EGL_NO_DISPLAY, egl_display);
   DCHECK(glIsTexture(texture_id));
 
-  // TODO: Need to generate and check EGL_KHR_gl_texture_2D_image
-  if (!gfx::g_driver_egl.ext.b_EGL_KHR_image_base ||
-      !gfx::g_driver_gl.ext.b_GL_OES_EGL_image) {
-    return NULL;
-  }
+  DCHECK(gfx::g_driver_egl.ext.b_EGL_KHR_image_base &&
+         gfx::g_driver_egl.ext.b_EGL_KHR_gl_texture_2D_image &&
+         gfx::g_driver_gl.ext.b_GL_OES_EGL_image &&
+         gfx::g_driver_egl.ext.b_EGL_KHR_fence_sync);
 
   const EGLint egl_attrib_list[] = {
       EGL_GL_TEXTURE_LEVEL_KHR, 0, EGL_IMAGE_PRESERVED_KHR, EGL_TRUE, EGL_NONE};
   EGLClientBuffer egl_buffer = reinterpret_cast<EGLClientBuffer>(texture_id);
   EGLenum egl_target = EGL_GL_TEXTURE_2D_KHR; // TODO
 
   EGLImageKHR egl_image = eglCreateImageKHR(
       egl_display, egl_context, egl_target, egl_buffer, egl_attrib_list);
 
   if (egl_image == EGL_NO_IMAGE_KHR)
@@ skipping 298 matching lines @@
 
   // All structural changes should have orphaned the texture.
   if (image_buffer_ && !texture->GetLevelImage(texture->target(), 0))
     return false;
 
   return true;
 }
 
 }  // namespace gles2
 }  // namespace gpu