#0  0xa8bfb612 in _M_end (this=0x4) at /usr/include/c++/4.9/bits/stl_tree.h:529
No locals.
#1  std::_Rb_tree<long long, std::pair<long long const, content::ResourceScheduler::Client*>, std::_Select1st<std::pair<long long const, content::ResourceScheduler::Client*> >, std::less<long long>, std::allocator<std::pair<long long const, content::ResourceScheduler::Client*> > >::find (this=0x4, __k=@0x9b01daa8: 12884901890) at /usr/include/c++/4.9/bits/stl_tree.h:1913
        __j = <optimized out>
#2  0xa8bfb708 in find (__x=@0x9b01daa8: 12884901890, this=0x4) at /usr/include/c++/4.9/bits/stl_map.h:860
No locals.
#3  content::ResourceScheduler::GetClient (this=0x0, child_id=3, route_id=2) at ../../../../third_party/chromium/src/content/browser/loader/resource_scheduler.cc:960
        client_id = 12884901890
        client_it = <optimized out>
#4  0xa8bfe0ba in content::ResourceScheduler::OnAudibilityChanged (this=0x0, child_id=3, route_id=2, is_audible=false) at ../../../../third_party/chromium/src/content/browser/loader/resource_scheduler.cc:902
        client = 0x3
#5  0xa8bed71c in content::ResourceDispatcherHostImpl::OnAudioRenderHostStreamStateChanged (this=0xb88eada8, child_id=3, route_id=2, is_playing=false) at ../../../../third_party/chromium/src/content/browser/loader/resource_dispatcher_host_impl.cc:1546
No locals.
#6  0xa8c5ba5a in content::AudioRendererHost::UpdateNumPlayingStreams (this=0xb87fe390, entry=0x90a6abf8, is_playing=false) at ../../../../third_party/chromium/src/content/browser/renderer_host/media/audio_renderer_host.cc:495
        should_alert_resource_scheduler = <optimized out>
#7  0xa8c5bac6 in content::AudioRendererHost::DeleteEntry (this=0xb87fe390, entry=...) at ../../../../third_party/chromium/src/content/browser/renderer_host/media/audio_renderer_host.cc:449
No locals.
#8  0xa8c5b013 in Run (a1=..., object=<optimized out>, this=<synthetic pointer>) at ../../../../third_party/chromium/src/base/bind_internal.h:190
No locals.
#9  MakeItSo (a2=..., a1=@0x8a84eb18: 0xb87fe390, runnable=...) at ../../../../third_party/chromium/src/base/bind_internal.h:898
No locals.
#10 base::internal::Invoker<2, base::internal::BindState<base::internal::RunnableAdapter<void (content::AudioRendererHost::*)(scoped_ptr<content::AudioRendererHost::AudioEntry, base::DefaultDeleter<content::AudioRendererHost::AudioEntry> >)>, void (content::AudioRendererHost*, scoped_ptr<content::AudioRendererHost::AudioEntry, base::DefaultDeleter<content::AudioRendererHost::AudioEntry> >), void (content::AudioRendererHost*, base::internal::PassedWrapper<scoped_ptr<content::AudioRendererHost::AudioEntry, base::DefaultDeleter<content::AudioRendererHost::AudioEntry> > >)>, void (content::AudioRendererHost*, scoped_ptr<content::AudioRendererHost::AudioEntry, base::DefaultDeleter<content::AudioRendererHost::AudioEntry> >)>::Run(base::internal::BindStateBase*) (base=0x8a84eb08) at ../../../../third_party/chromium/src/base/bind_internal.h:1253
        storage = 0x8a84eb08
        x2 = {impl_ = {data_ = {<base::DefaultDeleter<content::AudioRendererHost::AudioEntry>> = {<No data fields>}, ptr = 0x0}}}
#11 0xa8173189 in Run (this=0x8fba9404) at ../../../../third_party/chromium/src/base/callback.h:401
        f = <optimized out>
#12 base::(anonymous namespace)::PostTaskAndReplyRelay::RunReplyAndSelfDestruct (this=0x8fba93f0) at ../../../../third_party/chromium/src/base/threading/post_task_and_reply_impl.cc:58
No locals.
#13 0xa8173054 in Run (object=0x8fba93f0, this=<synthetic pointer>) at ../../../../third_party/chromium/src/base/bind_internal.h:134
No locals.
#14 MakeItSo (a1=0x8fba93f0, runnable=...) at ../../../../third_party/chromium/src/base/bind_internal.h:871
No locals.
#15 base::internal::Invoker<1, base::internal::BindState<base::internal::RunnableAdapter<void (base::(anonymous namespace)::PostTaskAndReplyRelay::*)()>, void(base::(anonymous namespace)::PostTaskAndReplyRelay*), void(base::internal::UnretainedWrapper<base::(anonymous namespace)::PostTaskAndReplyRelay>)>, void(base::(anonymous namespace)::PostTaskAndReplyRelay*)>::Run(base::internal::BindStateBase *) (base=0xb2925390) at ../../../../third_party/chromium/src/base/bind_internal.h:1169
        storage = 0xb2925390
        x1 = 0x8fba93f0
#16 0xa8112bbd in Run (this=0x9b01df38) at ../../../../third_party/chromium/src/base/callback.h:401
        f = <optimized out>
#17 base::debug::TaskAnnotator::RunTask (this=0xa59bb23c, queue_function=0xab01650b "MessageLoop::PostTask", run_function=0xab01652a "MessageLoop::RunTask", pending_task=...) at ../../../../third_party/chromium/src/base/debug/task_annotator.cc:63
        stopwatch = {start_time_ = {ms_ = 7149778}, wallclock_duration_ms_ = 0, current_thread_data_ = 0xa59cde98, excluded_duration_ms_ = 0, parent_ = 0x9b01e07c}
        queue_duration = {ms_ = 182}
        trace_event_unique_category_group_enabled53 = 0xac896d00 <base::debug::(anonymous namespace)::g_category_group_enabled> ""
        program_counter = 0xa88003eb <media::AudioOutputController::Close(base::Callback<void ()> const&)+59>
        trace_event_unique_atomic53 = -1400279808
        trace_event_unique_tracer53 = {p_data_ = 0x0, data_ = {category_group_enabled = 0x0, name = 0x0, event_handle = {chunk_seq = 2811355712, chunk_index = 51285, event_index = 46470}}}
#18 0xa814c4e4 in base::MessageLoop::RunTask (this=0xa59bb180, pending_task=...) at ../../../../third_party/chromium/src/base/message_loop/message_loop.cc:447
No locals.
#19 0xa814c85a in base::MessageLoop::DeferOrRunPendingTask (this=0xa59bb180, pending_task=...) at ../../../../third_party/chromium/src/base/message_loop/message_loop.cc:456
No locals.
#20 0xa814ce80 in base::MessageLoop::DoWork (this=0xa59bb180) at ../../../../third_party/chromium/src/base/message_loop/message_loop.cc:565
        pending_task = {<base::TrackingInfo> = {birth_tally = 0xb29253a8, time_posted = {static kClockSystemTrace = 11, ticks_ = 7149596376}, delayed_run_time = {static kClockSystemTrace = 11, ticks_ = 0}}, task = {<base::internal::CallbackBase> = {bind_state_ = {ptr_ = 0xb2925390}, polymorphic_invoke_ = 0xa8173030 <base::internal::Invoker<1, base::internal::BindState<base::internal::RunnableAdapter<void (base::(anonymous namespace)::PostTaskAndReplyRelay::*)()>, void(base::(anonymous namespace)::PostTaskAndReplyRelay*), void(base::internal::UnretainedWrapper<base::(anonymous namespace)::PostTaskAndReplyRelay>)>, void(base::(anonymous namespace)::PostTaskAndReplyRelay*)>::Run(base::internal::BindStateBase *)>}, <No data fields>}, posted_from = {function_name_ = 0xab104993 <media::AudioOutputController::Close(base::Callback<void ()> const&)::__FUNCTION__> "Close", file_name_ = 0xaaf73c74 "../../../../third_party/chromium/src/media/audio/audio_output_controller.cc", line_number_ = 83, program_counter_ = 0xa88003eb <media::AudioOutputController::Close(base::Callback<void ()> const&)+59>}, sequence_num = 40363, nestable = true, is_high_res = false}
#21 0xa81030af in base::MessagePumpLibevent::Run (this=0xa59dfbe8, delegate=0xa59bb180) at ../../../../third_party/chromium/src/base/message_loop/message_pump_libevent.cc:232
No locals.
#22 0xa814956a in base::MessageLoop::RunHandler (this=0xa59bb180) at ../../../../third_party/chromium/src/base/message_loop/message_loop.cc:415
No locals.
#23 0xa816255f in base::RunLoop::Run (this=0x9b01e0b8) at ../../../../third_party/chromium/src/base/run_loop.cc:55
        stopwatch = {start_time_ = {ms_ = 6865264}, wallclock_duration_ms_ = 0, current_thread_data_ = 0xa59cde98, excluded_duration_ms_ = 12958, parent_ = 0x0}
        this = 0x9b01e0b8
#24 0xa81490a2 in base::MessageLoop::Run (this=0xa59bb180) at ../../../../third_party/chromium/src/base/message_loop/message_loop.cc:308
        run_loop = {loop_ = 0xa59bb180, previous_run_loop_ = 0x0, run_depth_ = 1, run_called_ = true, quit_called_ = false, running_ = true, quit_when_idle_received_ = true, weak_factory_ = {weak_reference_owner_ = {flag_ = {ptr_ = 0x0}}, ptr_ = 0x9b01e0b8}}
#25 0xa8176db8 in base::Thread::Run (this=0xb8942d00, message_loop=0xa59bb180) at ../../../../third_party/chromium/src/base/threading/thread.cc:174
No locals.
#26 0xa8aa59de in content::BrowserThreadImpl::IOThreadRun (this=0xb8942d00, message_loop=0xa59bb180) at ../../../../third_party/chromium/src/content/browser/browser_thread_impl.cc:218
        line_number = 217
#27 0xa8aa5b16 in content::BrowserThreadImpl::Run (this=0xb8942d00, message_loop=0xa59bb180) at ../../../../third_party/chromium/src/content/browser/browser_thread_impl.cc:253
        thread_id = content::BrowserThread::IO
#28 0xa81770f7 in base::Thread::ThreadMain (this=0xb8942d00) at ../../../../third_party/chromium/src/base/threading/thread.cc:228
        message_loop = {impl_ = {data_ = {<base::DefaultDeleter<base::MessageLoop>> = {<No data fields>}, ptr = 0xa59bb180}}}
#29 0xa8172b29 in base::(anonymous namespace)::ThreadFunc (params=0xbfb5d74c) at ../../../../third_party/chromium/src/base/threading/platform_thread_posix.cc:80
        thread_params = 0xbfb5d74c
        delegate = 0xb8942d00
#30 0xb57e2f16 in start_thread (arg=0x9b01eb40) at pthread_create.c:309
        __res = <optimized out>
        pd = 0x9b01eb40
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {-1249943552, -1694373056, 4001536, -1694374872, -1898337648, 1900213452}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#31 0xb58e419e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:129
No locals.