Adds support for the GL_ANGLE_texture_usage and GL_EXT_texture_storage

gpu/command_buffer/service/gl_utils.h

 // Copyright (c) 2011 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 includes all the necessary GL headers and implements some useful
 // utilities.
 
 #ifndef GPU_COMMAND_BUFFER_SERVICE_GL_UTILS_H_
 #define GPU_COMMAND_BUFFER_SERVICE_GL_UTILS_H_
 
@@ skipping 27 matching lines @@
 #define GL_SAMPLER_EXTERNAL_OES                0x8D66
 #define GL_TEXTURE_BINDING_EXTERNAL_OES        0x8D67
 #define GL_REQUIRED_TEXTURE_IMAGE_UNITS_OES    0x8D68
 
 // GL_ANGLE_translated_shader_source
 #define GL_TRANSLATED_SHADER_SOURCE_LENGTH_ANGLE 0x93A0
 
 // GL_ANGLE_pack_reverse_row_order
 #define GL_PACK_REVERSE_ROW_ORDER_ANGLE    0x93A4
 
+// GL_ANGLE_texture_usage
+#define GL_TEXTURE_USAGE_ANGLE                 0x93A2
+#define GL_FRAMEBUFFER_ATTACHMENT_ANGLE        0x93A3
+
+// GL_EXT_texture_storage
+#define GL_TEXTURE_IMMUTABLE_FORMAT_EXT        0x912F
+#define GL_ALPHA8_EXT                          0x803C
+#define GL_LUMINANCE8_EXT                      0x8040
+#define GL_LUMINANCE8_ALPHA8_EXT               0x8045
+#define GL_RGBA32F_EXT                         0x8814
+#define GL_RGB32F_EXT                          0x8815
+#define GL_ALPHA32F_EXT                        0x8816
+#define GL_LUMINANCE32F_EXT                    0x8818
+#define GL_LUMINANCE_ALPHA32F_EXT              0x8819
+#define GL_RGBA16F_EXT                         0x881A
+#define GL_RGB16F_EXT                          0x881B
+#define GL_ALPHA16F_EXT                        0x881C
+#define GL_LUMINANCE16F_EXT                    0x881E
+#define GL_LUMINANCE_ALPHA16F_EXT              0x881F
+#define GL_BGRA8_EXT                           0x93A1
+
 #define GL_GLEXT_PROTOTYPES 1
 
 // Define this for extra GL error debugging (slower).
 // #define GL_ERROR_DEBUGGING
 #ifdef GL_ERROR_DEBUGGING
 #define CHECK_GL_ERROR() do {                                           \
     GLenum gl_error = glGetError();                                     \
     LOG_IF(ERROR, gl_error != GL_NO_ERROR) << "GL Error :" << gl_error; \
   } while (0)
 #else  // GL_ERROR_DEBUGGING
 #define CHECK_GL_ERROR() void(0)
 #endif  // GL_ERROR_DEBUGGING
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_GL_UTILS_H_