Update clang warnings after r287092.

libvpx.gyp

 # Copyright (c) 2012 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': {
     'libvpx_build_vp9%': 1,
     'libvpx_source%': 'source/libvpx',
     'conditions': [
       ['os_posix==1', {
         'asm_obj_extension': 'o',
@@ skipping 81 matching lines @@
             # really useful defines that come with a gcc invocation. In this
             # case, we rely on __ANDROID__ to set 'rand' to 'lrand48'.
             # Previously we used the builtin _rand but that's gone away.
             'conditions': [
               ['OS=="android"', {
                 'yasm_flags': [
                   '-D', '__ANDROID__',
                 ],
               }],
             ],
+            'clang_warning_flags': [
+              # libvpx heavily relies on implicit enum casting.
+              '-Wno-conversion',
+              # libvpx does `if ((a == b))` in some places.
+              '-Wno-parentheses-equality',
+            ],
           },
           'dependencies': [
             'gen_asm_offsets_vp8',
           ],
           'includes': [
             '../yasm/yasm_compile.gypi'
           ],
           'include_dirs': [
             'source/config/<(OS_CATEGORY)/<(target_arch_full)',
             'source/config',
@@ skipping 48 matching lines @@
                     #'libvpx_intrinsics_sse3',
                     'libvpx_intrinsics_ssse3',
                     'libvpx_intrinsics_sse4_1',
                     # Currently no avx intrinsic functions
                     #'libvpx_intrinsics_avx',
                     #'libvpx_intrinsics_avx2',
                   ],
                 }],
               ],
             }],
-            ['clang == 1', {
-              'xcode_settings': {
-                'WARNING_CFLAGS': [
-                  # libvpx heavily relies on implicit enum casting.
-                  '-Wno-conversion',
-                  # libvpx does `if ((a == b))` in some places.
-                  '-Wno-parentheses-equality',
-                ],
-              },
-              'cflags': [
-                '-Wno-conversion',
-                '-Wno-parentheses-equality',
-              ],
-            }],
           ],
         },
       ],
     },
     ],
     # 'libvpx' target for mips builds.
     [ 'target_arch=="mipsel" ', {
       'targets': [
         {
           # This libvpx target contains both encoder and decoder.
@@ skipping 383 matching lines @@
          # Need this otherwise gyp won't run the rule on them.
           'sources': [
             '<(INTERMEDIATE_DIR)/vpx_scale_asm_offsets.o',
           ],
         }],
       ],
       'includes': ['obj_int_extract.gypi'],
     },
   ],
 }