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 618 matching lines @@
 #endif
 #endif /* GL_CHROMIUM_color_buffer_float_rgba */
 
 #ifndef GL_CHROMIUM_color_buffer_float_rgb
 #define GL_CHROMIUM_color_buffer_float_rgb 1
 #ifndef GL_RGB32F
 #define GL_RGB32F 0x8815
 #endif
 #endif /* GL_CHROMIUM_color_buffer_float_rgb */
 
+#ifndef GL_CHROMIUM_NV_path_rendering
+#define GL_CHROMIUM_NV_path_rendering 1
+
+#ifdef GL_GLEXT_PROTOTYPES
+GL_APICALL void GL_APIENTRY glMatrixMode(GLenum mode);
+GL_APICALL void GL_APIENTRY glLoadMatrixf(const GLfloat* m);
+GL_APICALL void GL_APIENTRY glLoadIdentity();
+#endif
+
+typedef void (GL_APIENTRYP PFNGLMATRIXMODEPROC) (GLenum mode);
+typedef void (GL_APIENTRYP PFNGLLOADMATRIXFPROC) (const GLfloat* m);
+typedef void (GL_APIENTRYP PFNGLLOADIDENTITYPROC) ();
+
+#endif /* GL_CHROMIUM_NV_path_rendering */
+
 #ifdef __cplusplus
 }
 #endif
 
 #endif  // GPU_GLES2_GL2EXTCHROMIUM_H_