Allow creating GLImage-backed textures with glTexStorage2D.

gpu/command_buffer/service/gles2_cmd_validation_implementation_autogen.h

 // 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.
 
 // This file is auto-generated from
 // gpu/command_buffer/build_gles2_cmd_buffer.py
 // It's formatted by clang-format using chromium coding style:
 //    clang-format -i -style=chromium filename
 // DO NOT EDIT!
 
@@ skipping 953 matching lines @@
 };
 
 static const GLenum valid_texture_bind_target_table[] = {
     GL_TEXTURE_2D, GL_TEXTURE_CUBE_MAP,
 };
 
 static const GLenum valid_texture_bind_target_table_es3[] = {
     GL_TEXTURE_3D, GL_TEXTURE_2D_ARRAY,
 };
 
+bool Validators::TextureBufferUsageValidator::IsValid(
+    const GLenum value) const {
+  switch (value) {
+    case GL_NONE:
+    case GL_TEXTURE_BUFFER_SCANOUT_CHROMIUM:
+      return true;
+  }
+  return false;
+};
+
 bool Validators::TextureCompareFuncValidator::IsValid(
     const GLenum value) const {
   switch (value) {
     case GL_LEQUAL:
     case GL_GEQUAL:
     case GL_LESS:
     case GL_GREATER:
     case GL_EQUAL:
     case GL_NOTEQUAL:
     case GL_ALWAYS:
@@ skipping 547 matching lines @@
   texture_internal_format_storage.AddValue(GL_COMPRESSED_SRGB8_ETC2);
   texture_internal_format_storage.AddValue(
       GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2);
   texture_internal_format_storage.AddValue(
       GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2);
   texture_internal_format_storage.AddValue(GL_COMPRESSED_RGBA8_ETC2_EAC);
   texture_internal_format_storage.AddValue(GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC);
 }
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_VALIDATION_IMPLEMENTATION_AUTOGEN_H_