Add initial support for NV_path_rendering extension to gpu command buffer

ppapi/c/ppb_opengles2.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 481 matching lines @@
                               GLint size,
                               GLenum type,
                               GLboolean normalized,
                               GLsizei stride,
                               const void* ptr);
   void (*Viewport)(PP_Resource context,
                    GLint x,
                    GLint y,
                    GLsizei width,
                    GLsizei height);
+  void (*LoadIdentity)(PP_Resource context);

[vmiura, 2014/04/11 21:54:48]

Should the other APIs also be added here?

void glMatrixMode(GLenum mode) 
void glLoadMatrixf(const GLfloat* m) 

[piman, 2014/04/11 22:19:27]

Actually, we shouldn't change this interface, otherwise we can break existing
plugins. If we want to expose these as extensions, they need to be described as
such, like below.

[vmiura, 2014/04/11 22:49:50]

Right.  Please follow @jbauman's comment to remove LoadIdentity from ppapi.

[Kimmo Kinnunen, 2014/04/15 16:16:58]

Done.

 };
 
 #define PPB_OPENGLES2_INSTANCEDARRAYS_INTERFACE_1_0 \
   "PPB_OpenGLES2InstancedArrays;1.0"
 #define PPB_OPENGLES2_INSTANCEDARRAYS_INTERFACE \
   PPB_OPENGLES2_INSTANCEDARRAYS_INTERFACE_1_0
 
 struct PPB_OpenGLES2InstancedArrays {
   void (*DrawArraysInstancedANGLE)(PP_Resource context,
                                    GLenum mode,
@@ skipping 93 matching lines @@
                         GLenum target,
                         GLenum pname,
                         GLint* params);
   void (*GetQueryObjectuivEXT)(PP_Resource context,
                                GLuint id,
                                GLenum pname,
                                GLuint* params);
 };
 
 #endif  // PPAPI_C_PPB_OPENGLES2_H_