Mojom frontend: Compute, validate and populate struct field version info

mojom/mojom_parser/BUILD.gn

 # Copyright 2015 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.
 
 import("//mojo/go/rules.gni")
 
 # The purpose of this target is to ensure the parser remains buildable on all
 # platforms. The output files are not consumed by anything. The parser is built
 # and uploaded to GCS by manually running build_mojom_tool.py.
 action("mojom_tool") {
   script = "tools/build_mojom_tool.py"
 
   inputs = [
     "generated/mojom_files/mojom_files.mojom.go",
     "generated/mojom_types/mojom_types.mojom.go",
     "lexer/lexer.go",
     "lexer/token_stream.go",
     "lexer/tokens.go",
     "mojom/computed_data.go",
     "mojom/mojom_descriptor.go",
     "mojom/scopes.go",
     "mojom/types.go",
     "mojom/user_defined_types.go",
     "mojom/utils.go",
+    "parser/computed_data_test.go",
     "parser/parse_driver.go",
     "parser/parser.go",
     "parser/parsing.go",
+    "parser/resolution_test.go",
     "serialization/serialization.go",
     "utils/sort_utils.go",
   ]
 
   outputs = [
     "$target_out_dir/mojom_linux_amd64",
     "$target_out_dir/mojom_darwin_amd64",
   ]
 
   args = [
     "--src-root",
     rebase_path("//", root_build_dir),
     "--out-dir",
     rebase_path(target_out_dir, root_build_dir),
     "--quiet",
   ]
 }