win: Remove disabling some warnings

build/common.gypi

 # Copyright 2009 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.
 
 {
   'variables': {
     'variables': {
       'clang%': 0,
       'conditions': [
         ['OS=="mac"', {
@@ skipping 172 matching lines @@
           },
           'VCLinkerTool': {
             'GenerateDebugInformation': 'true',
             'RandomizedBaseAddress': '2',  # /DYNAMICBASE.
             'SubSystem': '1',
           },
         },
         'msvs_disabled_warnings': [
           4100,  # Unreferenced formal parameter.
           4127,  # Conditional expression is constant.
-          4201,  # Nonstandard extension used : nameless struct/union.
-          4324,  # 'X' was padded due to __declspec(align()).
           4351,  # New behavior: elements of array will be default initialized.
           4530,  # Exceptions are disabled.
           4702,  # Unreachable code. https://crbug.com/346399
-          4706,  # Assignment within conditional expression.
           4996,  # 'X' was declared deprecated.
         ],
         'defines': [
           '_HAS_EXCEPTIONS=0',
           '_CRT_SECURE_NO_WARNINGS',
           'NOMINMAX',
           'WIN32_LEAN_AND_MEAN',
         ],
         'conditions': [
           ['target_arch=="ia32"', {
@@ skipping 134 matching lines @@
   },
 
   'conditions': [
     ['OS=="mac"', {
       'xcode_settings': {
         'SYMROOT': '<(DEPTH)/xcodebuild',
       },
     }],
   ],
 }