Fix all -Wnon-virtual-dtor warnings.

webrtc/pc/pc.gyp

 # Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
 #
 # Use of this source code is governed by a BSD-style license
 # that can be found in the LICENSE file in the root of the source
 # tree. An additional intellectual property rights grant can be found
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
 {
   'includes': ['../build/common.gypi'],
@@ skipping 15 matching lines @@
       'conditions': [
         ['build_libsrtp==1', {
           'dependencies': [
             '<(DEPTH)/third_party/libsrtp/libsrtp.gyp:libsrtp',
           ],
         }],
       ],
       'defines': [
         '<@(rtc_pc_defines)',
       ],
-      # TODO(kjellander): Make the code compile without disabling these flags.
-      # See https://bugs.chromium.org/p/webrtc/issues/detail?id=3307
-      'cflags_cc!': [
-        '-Wnon-virtual-dtor',
-      ],
       'include_dirs': [
         '<(DEPTH)/testing/gtest/include',
       ],
       'direct_dependent_settings': {
         'defines': [
           '<@(rtc_pc_defines)'
         ],
         'include_dirs': [
           '<(DEPTH)/testing/gtest/include',
         ],
@@ skipping 39 matching lines @@
           ],
           'sources': [
             'bundlefilter_unittest.cc',
             'channel_unittest.cc',
             'channelmanager_unittest.cc',
             'currentspeakermonitor_unittest.cc',
             'mediasession_unittest.cc',
             'rtcpmuxfilter_unittest.cc',
             'srtpfilter_unittest.cc',
           ],
-          # TODO(kjellander): Make the code compile without disabling these flags.
-          # See https://bugs.chromium.org/p/webrtc/issues/detail?id=3307
-          'cflags_cc!': [
-            '-Wnon-virtual-dtor',
-          ],
           'conditions': [
             ['clang==0', {
               'cflags': [
                 '-Wno-maybe-uninitialized',  # Only exists for GCC.
               ],
             }],
             ['build_libsrtp==1', {
               'dependencies': [
                 '<(DEPTH)/third_party/libsrtp/libsrtp.gyp:libsrtp',
               ],
@@ skipping 25 matching lines @@
               'sources': [
                 'rtc_pc_unittests.isolate',
               ],
             },
           ],
         }],
       ],  # conditions
     }],  # include_tests==1
   ],  # conditions
 }