Remove TSan suppression after fixing the bug.

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 # running overnight and removing outdated bugs/suppressions.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 600 matching lines @@
   fun:webkit_glue::WebURLLoaderImpl::Context::OnCompletedRequest
   fun:ResourceDispatcher::OnRequestComplete
 }
 {
    bug_93757
    ThreadSanitizer:Race
    fun:__memset_sse2
    fun:VisitedLinkMaster::CreateURLTable
 }
 {
-   bug_93777_a
-   ThreadSanitizer:Race
-   fun:WebCore::Document::detach
-   fun:WebCore::Frame::setView
-   fun:WebKit::WebFrameImpl::createFrameView
-   fun:WebKit::FrameLoaderClientImpl::makeDocumentView
-   fun:WebKit::FrameLoaderClientImpl::transitionToCommittedForNewPage
-   fun:WebCore::FrameLoader::transitionToCommitted
-   fun:WebCore::FrameLoader::commitProvisionalLoad
-   fun:WebCore::DocumentLoader::commitIfReady
-   fun:WebCore::DocumentLoader::finishedLoading
-   fun:WebCore::FrameLoader::finishedLoading
-   fun:WebCore::MainResourceLoader::didFinishLoading
-   fun:WebCore::MainResourceLoader::continueAfterContentPolicy
-   fun:WebCore::MainResourceLoader::continueAfterContentPolicy
-   fun:WebCore::MainResourceLoader::callContinueAfterContentPolicy
-   fun:WebCore::PolicyCallback::call
-   fun:WebCore::PolicyChecker::continueAfterContentPolicy
-   fun:WebKit::FrameLoaderClientImpl::dispatchDecidePolicyForResponse
-   fun:WebCore::PolicyChecker::checkContentPolicy
-   fun:WebCore::MainResourceLoader::didReceiveResponse
-   fun:WebCore::MainResourceLoader::handleEmptyLoad
-   fun:WebCore::MainResourceLoader::loadNow
-   fun:WebCore::MainResourceLoader::load
-   fun:WebCore::DocumentLoader::startLoadingMainResource
-   fun:WebCore::FrameLoader::continueLoadAfterWillSubmitForm
-   fun:WebCore::FrameLoader::continueLoadAfterNavigationPolicy
-   fun:WebCore::FrameLoader::callContinueLoadAfterNavigationPolicy
-   fun:WebCore::PolicyCallback::call
-   fun:WebCore::PolicyChecker::continueAfterNavigationPolicy
-   fun:WebKit::FrameLoaderClientImpl::dispatchDecidePolicyForNavigationAction
-   fun:WebCore::PolicyChecker::checkNavigationPolicy
-}
-{
-   bug_93777_b
-   ThreadSanitizer:Race
-   fun:WebCore::Document::page
-   fun:WebCore::InspectorInstrumentation::instrumentingAgentsForContext
-   fun:WebCore::InspectorInstrumentation::workerContextTerminated
-   fun:WebKit::WebWorkerClientImpl::workerContextDestroyed
-   fun:WebCore::WorkerContext::~WorkerContext
-   fun:WebCore::DedicatedWorkerContext::~DedicatedWorkerContext
-   fun:WTF::RefCounted::deref
-   fun:WTF::RefPtr::operator=
-   fun:WebCore::WorkerThread::workerThread
-   fun:WebCore::WorkerThread::workerThreadStart
-   fun:WTF::threadEntryPoint
-}
-{
    bug_93932_a
    ThreadSanitizer:Race
    ...
    fun:frame_thread_free
    fun:ff_thread_free
    fun:avcodec_close
    fun:avcodec_close
    fun:media::FFmpegVideoDecodeEngine::~FFmpegVideoDecodeEngine
    fun:scoped_ptr::reset
    fun:media::FFmpegVideoDecodeEngineTest::~FFmpegVideoDecodeEngineTest
@@ skipping 35 matching lines @@
    fun:testing::internal::ActionResultHolder::PerformAction
    fun:testing::internal::FunctionMockerBase::UntypedPerformAction
    fun:testing::internal::UntypedFunctionMockerBase::UntypedInvokeWith
    fun:testing::internal::FunctionMockerBase::InvokeWith
    fun:testing::internal::FunctionMocker::Invoke
    fun:media::FFmpegVideoDecodeEngineTest::ProduceVideoSample
    fun:media::FFmpegVideoDecodeEngine::ReadInput
 }