Remove some media-related tsan suppressions that are no longer valid.

tools/valgrind/tsan/suppressions.txt

 # There are a few kinds of suppressions in this file.
 # 1. third party stuff we have no control over
 #
 # 2. intentional unit test errors, or stuff that is somehow a false positive
 # in our own code, or stuff that is so trivial it's not worth fixing
 #
 # 3. Suppressions for real chromium bugs that are not yet fixed.
 # These should all be in chromium's bug tracking system (but a few aren't yet).
 # Periodically we should sweep this file and the bug tracker clean by
 # running overnight and removing outdated bugs/suppressions.
@@ skipping 414 matching lines @@
 
 {
   bug_41314
   ThreadSanitizer:Race
   ...
   fun:base::LaunchApp*
   fun:ChildProcessLauncher::Context::LaunchInternal*
 }
 
 {
-  bug_46642a
-  ThreadSanitizer:Race
-  fun:*media*Pipeline*InitializeTask*
-}
-
-{
-  bug_46642b
-  ThreadSanitizer:Race
-  fun:*media*Pipeline*GetCurrentTime*
-}
-
-{
   bug_57266a
   ThreadSanitizer:Race
   ...
   fun:*vp8*_*
 }
 
 {
   bug_57266b
   ThreadSanitizer:Race
   ...
@@ skipping 294 matching lines @@
   fun:main
 }
 {
   bug_106196
   ThreadSanitizer:Race
   fun:tracked_objects::ThreadData::InitializeAndSetTrackingStatus
   fun:ChildThread::OnSetProfilerStatus
   fun:DispatchToMethod
 }
 {
-  bug_107181a
-  ThreadSanitizer:Race
-  ...
-  fun:media::AudioRendererBase::SetPlaybackRate
-  fun:AudioRendererImpl::SetPlaybackRate
-  fun:media::CompositeFilter::SetPlaybackRate
-  fun:media::Pipeline::PlaybackRateChangedTask
-  ...
-  fun:base::internal::RunnableAdapter::Run
-}
-{
-  bug_107181b
-  ThreadSanitizer:Race
-  fun:media::AudioRendererAlgorithmBase::playback_rate
-  fun:media::AudioRendererBase::GetPlaybackRate
-  fun:AudioRendererImpl::Render
-  fun:AudioDevice::FireRenderCallback
-  fun:AudioDevice::Run
-}
-{
    bug_107903_a
    ThreadSanitizer:Race
    ...
    fun:TestProfileSyncService::~TestProfileSyncService
    fun:scoped_ptr::reset
    fun:ProfileSyncServiceAutofillTest::TearDown
 }
 {
    bug_107903_b
    ThreadSanitizer:Race
@@ skipping 228 matching lines @@
    ...
    fun:testing::internal::UntypedFunctionMockerBase::UntypedInvokeWith
    fun:testing::internal::FunctionMockerBase::InvokeWith
    fun:testing::internal::FunctionMocker::Invoke
    fun:browser_sync::NewNonFrontendDataTypeControllerMock::RecordUnrecoverableError
    fun:browser_sync::::NewNonFrontendDataTypeControllerFake::RecordUnrecoverableError
    fun:browser_sync::NonFrontendDataTypeController::StartFailed
    fun:browser_sync::NewNonFrontendDataTypeController::StartAssociationWithSharedChangeProcessor
    fun:base::internal::RunnableAdapter::Run
 }