Add initial support for NV_path_rendering extension to gpu command buffer

gpu/GLES2/gl2extchromium.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.
 
 // This file contains Chromium-specific GLES2 extensions declarations.
 
 #ifndef GPU_GLES2_GL2EXTCHROMIUM_H_
 #define GPU_GLES2_GL2EXTCHROMIUM_H_
 
 #include <GLES2/gl2.h>
@@ skipping 674 matching lines @@
     GLint bounds_x,
     GLint bounds_y,
     GLint bounds_width,
     GLint bounds_height,
     GLfloat uv_x,
     GLfloat uv_y,
     GLfloat uv_width,
     GLfloat uv_height);
 #endif /* GL_CHROMIUM_schedule_overlay_plane */
 
+#ifndef GL_CHROMIUM_path_rendering
+#define GL_CHROMIUM_path_rendering 1
+
+#ifdef GL_GLEXT_PROTOTYPES
+GL_APICALL void GL_APIENTRY glMatrixLoadfCHROMIUM(GLenum mode,
+                                                  const GLfloat* m);
+GL_APICALL void GL_APIENTRY glMatrixLoadIdentityCHROMIUM(GLenum mode);
+#endif
+
+typedef void (GL_APIENTRYP PFNGLMATRIXLOADFCHROMIUMPROC) (
+    GLenum matrixMode, const GLfloat* m);
+typedef void (GL_APIENTRYP PFNGLMATRIXLOADIDENTITYCHROMIUMPROC) (
+    GLenum matrixMode);
+
+#endif /* GL_CHROMIUM_path_rendering */
+
 #ifdef __cplusplus
 }
 #endif
 
 #endif  // GPU_GLES2_GL2EXTCHROMIUM_H_