Address some TODO(GYP)s in the GN build.

chrome/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/buildflag_header.gni")
 import("//build/config/chrome_build.gni")
 import("//build/config/compiler/compiler.gni")
 import("//build/config/features.gni")
 import("//build/config/locales.gni")
 import("//build/config/sanitizers/sanitizers.gni")
@@ skipping 113 matching lines @@
         "app/main_dll_loader_win.cc",
         "app/main_dll_loader_win.h",
         "common/crash_keys.cc",
         "common/crash_keys.h",
       ]
 
       deps += [
         ":chrome_dll",
         ":chrome_exe_version",
         ":file_pre_reader",
-
-        # 'chrome_nacl_win64" TODO(GYP) bug 512869

[brettw, 2016/05/04 19:51:28]

This is nacl64.exe which gets build inside of native_client somewhere. The
packaging steps depend on it.

         "//base",
         "//breakpad:breakpad_handler",
         "//breakpad:breakpad_sender",
         "//chrome/app/version_assembly:chrome_exe_manifest",
         "//chrome/browser:chrome_process_finder",
         "//chrome/chrome_watcher",
         "//chrome/chrome_watcher:client",
         "//chrome/common:constants",
         "//chrome/common:metrics_constants_util_win",
         "//chrome/installer/util:with_no_strings",
@@ skipping 1178 matching lines @@
       inputs = [
         chrome_binary,
         dump_syms_binary,
       ]
       outputs = [
         symbol_file,
       ]
 
       args = [
         "./" + rebase_path(dump_syms_binary, root_build_dir),
-        "0",  # TODO(GYP) This is linux_strip_binary if it is needed.
+        "0",  # strip_binary = false
         rebase_path(chrome_binary, root_build_dir),
         rebase_path(symbol_file, root_build_dir),
       ]
 
       deps = [
         ":chrome",
         dump_syms_label,
       ]
     }
   }
 
   # Copies some scripts and resources that are used for desktop integration.
   copy("xdg_mime") {
     sources = [
       "//chrome/app/theme/$branding_path_component/product_logo_48.png",
       "//chrome/tools/build/linux/chrome-wrapper",
       "//third_party/xdg-utils/scripts/xdg-mime",
       "//third_party/xdg-utils/scripts/xdg-settings",
     ]
     outputs = [
       "$root_out_dir/{{source_file_part}}",
     ]
   }
 }