[wasm] Implement official wasm text format

BUILD.gn

 # 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.
 
 import("//build/config/android/config.gni")
 import("//build/config/arm.gni")
 import("//build/config/dcheck_always_on.gni")
 import("//build/config/mips.gni")
 import("//build/config/sanitizers/sanitizers.gni")
 
@@ skipping 1736 matching lines @@
     "src/wasm/wasm-module-builder.cc",
     "src/wasm/wasm-module-builder.h",
     "src/wasm/wasm-module.cc",
     "src/wasm/wasm-module.h",
     "src/wasm/wasm-objects.cc",
     "src/wasm/wasm-objects.h",
     "src/wasm/wasm-opcodes.cc",
     "src/wasm/wasm-opcodes.h",
     "src/wasm/wasm-result.cc",
     "src/wasm/wasm-result.h",
+    "src/wasm/wasm-text.cc",
+    "src/wasm/wasm-text.h",
     "src/zone/accounting-allocator.cc",
     "src/zone/accounting-allocator.h",
     "src/zone/zone-allocator.h",
     "src/zone/zone-allocator.h",
     "src/zone/zone-chunk-list.h",
     "src/zone/zone-containers.h",
     "src/zone/zone-segment.cc",
     "src/zone/zone-segment.h",
     "src/zone/zone.cc",
     "src/zone/zone.h",
@@ skipping 1234 matching lines @@
   ]
 
   configs = [
     ":external_config",
     ":internal_config_base",
   ]
 }
 
 v8_fuzzer("wasm_data_section_fuzzer") {
 }