Remove data race suppressions for issue 290964, which is long fixed.

build/sanitizers/tsan_suppressions.cc

 // 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.
 
 // This file contains the default suppressions for ThreadSanitizer.
 // You can also pass additional suppressions via TSAN_OPTIONS:
 // TSAN_OPTIONS=suppressions=/path/to/suppressions. Please refer to
 // http://dev.chromium.org/developers/testing/threadsanitizer-tsan-v2
 // for more info.
 
@@ skipping 131 matching lines @@
 // http://crbug.com/273047
 "race:base::*::g_lazy_tls_ptr\n"
 "race:IPC::SyncChannel::ReceivedSyncMsgQueue::lazy_tls_ptr_\n"
 
 // http://crbug.com/280466
 "race:content::WebRtcAudioCapturer::SetCapturerSource\n"
 
 // http://crbug.com/285242
 "race:media::PulseAudioOutputStream::SetVolume\n"
 
-// http://crbug.com/290964
-"race:PostponeInterruptsScope\n"
-"race:v8::internal::StackGuard::RequestInstallCode\n"
-
 // http://crbug.com/296883
 "race:net::URLFetcherCore::Stop\n"
 
 // http://crbug.com/308590
 "race:CustomThreadWatcher::~CustomThreadWatcher\n"
 
 // http://crbug.com/310851
 "race:net::ProxyResolverV8Tracing::Job::~Job\n"
 
 // http://crbug.com/313726
@@ skipping 145 matching lines @@
 "deadlock:content::WebRtcAudioDeviceImpl\n"
 
 // http://crbug.com/417193
 // Suppressing both AudioContext.{cpp,h}.
 "race:modules/webaudio/AudioContext\n"
 
 // End of suppressions.
 ;  // Please keep this semicolon.
 
 #endif  // THREAD_SANITIZER