Add initial support for NV_path_rendering extension to gpu command buffer

gpu/command_buffer/service/context_state_impl_autogen.h

Index: gpu/command_buffer/service/context_state_impl_autogen.h
diff --git a/gpu/command_buffer/service/context_state_impl_autogen.h b/gpu/command_buffer/service/context_state_impl_autogen.h
index 9a42ae1d6c2243410bf142b2016aa1f561b0575f..00cff32160a8933bed534cf1af1adaac586b7473 100644
--- a/gpu/command_buffer/service/context_state_impl_autogen.h
+++ b/gpu/command_buffer/service/context_state_impl_autogen.h
@@ -53,6 +53,7 @@ void ContextState::Initialize() {
   hint_generate_mipmap = GL_DONT_CARE;
   hint_fragment_shader_derivative = GL_DONT_CARE;
   line_width = 1.0f;
+  matrix_mode = GL_MODELVIEW;
   pack_alignment = 4;
   unpack_alignment = 4;
   polygon_offset_factor = 0.0f;
@@ -118,6 +119,8 @@ void ContextState::InitState() const {
     glHint(GL_FRAGMENT_SHADER_DERIVATIVE_HINT_OES,
            hint_fragment_shader_derivative);
   glLineWidth(line_width);
+  if (feature_info_->feature_flags().nv_path_rendering)
+    glMatrixMode(matrix_mode);
   glPixelStorei(GL_PACK_ALIGNMENT, pack_alignment);
   glPixelStorei(GL_UNPACK_ALIGNMENT, unpack_alignment);
   glPolygonOffset(polygon_offset_factor, polygon_offset_units);
@@ -293,6 +296,12 @@ bool ContextState::GetStateAsGLint(GLenum pname,
         params[0] = static_cast<GLint>(line_width);
       }
       return true;
+    case GL_MATRIX_MODE:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLint>(matrix_mode);
+      }
+      return true;
     case GL_PACK_ALIGNMENT:
       *num_written = 1;
       if (params) {
@@ -618,6 +627,12 @@ bool ContextState::GetStateAsGLfloat(GLenum pname,
         params[0] = static_cast<GLfloat>(line_width);
       }
       return true;
+    case GL_MATRIX_MODE:
+      *num_written = 1;
+      if (params) {
+        params[0] = static_cast<GLfloat>(matrix_mode);
+      }
+      return true;
     case GL_PACK_ALIGNMENT:
       *num_written = 1;
       if (params) {