Add initial support for NV_path_rendering extension to gpu command buffer

ui/gl/gl_bindings.h

 // 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.
 
 #ifndef UI_GL_GL_BINDINGS_H_
 #define UI_GL_GL_BINDINGS_H_
 
 // Includes the platform independent and platform dependent GL headers.
 // Only include this in cc files. It pulls in system headers, including
 // the X11 headers on linux, which define all kinds of macros that are
@@ skipping 195 matching lines @@
 #define GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_SAMPLES_EXT    0x8D6C
 #endif
 
 #ifndef GL_IMG_multisampled_render_to_texture
 #define GL_RENDERBUFFER_SAMPLES_IMG                      0x9133
 #define GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE_IMG        0x9134
 #define GL_MAX_SAMPLES_IMG                               0x9135
 #define GL_TEXTURE_SAMPLES_IMG                           0x9136
 #endif
 
+#ifndef GL_CHROMIUM_path_rendering
+// These match the corresponding values in NV_path_rendering
+// extension, eg tokens with CHROMIUM replaced with NV.
+#define GL_PATH_MODELVIEW_MATRIX_CHROMIUM 0x0BA6
+#define GL_PATH_PROJECTION_MATRIX_CHROMIUM 0x0BA7
+#define GL_PATH_MODELVIEW_CHROMIUM 0x1700
+#define GL_PATH_PROJECTION_CHROMIUM 0x1701
+#endif
+
 #define GL_GLEXT_PROTOTYPES 1
 
 #if defined(OS_WIN)
 #define GL_BINDING_CALL WINAPI
 #else
 #define GL_BINDING_CALL
 #endif
 
 #define GL_SERVICE_LOG(args) DLOG(INFO) << args;
 #if defined(NDEBUG)
@@ skipping 126 matching lines @@
 #elif defined(OS_ANDROID)
 
 GL_EXPORT extern EGLApi* g_current_egl_context;
 GL_EXPORT extern DriverEGL g_driver_egl;
 
 #endif
 
 }  // namespace gfx
 
 #endif  // UI_GL_GL_BINDINGS_H_