Add subscribeUniform extension pipeline

gpu/command_buffer/service/gles2_cmd_validation_implementation_autogen.h

Index: gpu/command_buffer/service/gles2_cmd_validation_implementation_autogen.h
diff --git a/gpu/command_buffer/service/gles2_cmd_validation_implementation_autogen.h b/gpu/command_buffer/service/gles2_cmd_validation_implementation_autogen.h
index 790b9b3edb89bbba4192891606c871b97c511c9f..bf74f13ee332212b0dbfcbb45c49b8d6891c97b3 100644
--- a/gpu/command_buffer/service/gles2_cmd_validation_implementation_autogen.h
+++ b/gpu/command_buffer/service/gles2_cmd_validation_implementation_autogen.h
@@ -493,6 +493,10 @@ static const GLenum valid_texture_wrap_mode_table[] = {
     GL_REPEAT,
 };
 
+static const GLenum valid_uniform_subscription_target_table[] = {
+    GL_MOUSE_POSITION_CHROMIUM,
+};
+
 static const GLint valid_vertex_attrib_size_table[] = {
     1,
     2,
@@ -616,6 +620,9 @@ Validators::Validators()
                     arraysize(valid_texture_usage_table)),
       texture_wrap_mode(valid_texture_wrap_mode_table,
                         arraysize(valid_texture_wrap_mode_table)),
+      uniform_subscription_target(
+          valid_uniform_subscription_target_table,
+          arraysize(valid_uniform_subscription_target_table)),
       vertex_attrib_size(valid_vertex_attrib_size_table,
                          arraysize(valid_vertex_attrib_size_table)),
       vertex_attrib_type(valid_vertex_attrib_type_table,