clang/win: Add a few tracking bugs for -Wno flags up to e.

build/config/compiler/BUILD.gn

 # Copyright (c) 2013 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/chrome_build.gni")
 if (current_cpu == "arm") {
   import("//build/config/arm.gni")
 }
 if (current_cpu == "mipsel" || current_cpu == "mips64el") {
@@ skipping 779 matching lines @@
   if (!msvs_xtree_patched &&
       exec_script("../../win_is_xtree_patched.py", [], "value") == 0) {
     default_warning_flags += [ "/wd4702" ]  # Unreachable code.
   }
 
   # Building with Clang on Windows is a work in progress and very
   # experimental. See crbug.com/82385.
   # Keep this in sync with the similar block in build/common.gypi
   if (is_clang) {
     default_warning_flags += [
-      # TODO(hans): Make this list shorter eventually.
-      "-Qunused-arguments",
-      "-Wno-c++11-compat-deprecated-writable-strings",
-      "-Wno-deprecated-declarations",
-      "-Wno-empty-body",
-      "-Wno-enum-conversion",
-      "-Wno-extra-tokens",
+      # TODO(hans): Make this list shorter eventually, http://crbug.com/504657
+      "-Qunused-arguments",  # http://crbug.com/504658
+      "-Wno-c++11-compat-deprecated-writable-strings",  # http://crbug.com/504659
+      "-Wno-deprecated-declarations",  # http://crbug.com/504660
+      "-Wno-empty-body",  # http://crbug.com/504661
+      "-Wno-enum-conversion",  # http://crbug.com/504662
+      "-Wno-extra-tokens",  # http://crbug.com/504663
       "-Wno-ignored-attributes",
       "-Wno-incompatible-pointer-types",
       "-Wno-int-to-void-pointer-cast",
       "-Wno-invalid-noreturn",
       "-Wno-logical-op-parentheses",
       "-Wno-microsoft",
       "-Wno-missing-braces",
       "-Wno-missing-declarations",
       "-Wno-msvc-include",
       "-Wno-null-dereference",
@@ skipping 430 matching lines @@
       cflags += [ "-gsplit-dwarf" ]
     }
   }
 }
 
 config("no_symbols") {
   if (!is_win) {
     cflags = [ "-g0" ]
   }
 }