Product name: Chrome_Linux
Magic Signature: [Shutdown File Thread hang] base::ReadFileToStringWithMaxSize

Current link:
https://crash.corp.google.com/browse?q=product.name%3D'Chrome_Linux'%20AND%20product.version%3D'58.0.3013.3'%20AND%20custom_data.ChromeCrashProto.ptype%3D'browser'%20AND%20custom_data.ChromeCrashProto.magic_signature_1.name%3D'%5BShutdown%20File%20Thread%20hang%5D%20base%3A%3AReadFileToStringWithMaxSize'%20AND%20ReportID%3D'2c1306d300000000'&ignore_case=false&enable_rewrite=true&omit_field_name=&omit_field_value=&omit_field_opt=%3D#3


Search properties:
product.name: Chrome_Linux
product.version: 58.0.3013.3
custom_data.chromecrashproto.ptype: browser
custom_data.chromecrashproto.magic_signature_1.name: [Shutdown File Thread hang] base::ReadFileToStringWithMaxSize
reportid: 2c1306d300000000

Metadata :
Product Name: Chrome_Linux
Product Version: 58.0.3013.3
Report ID: 2c1306d300000000
Report Time: Mon, 20 Feb 2017 05:08:15 GMT
Uptime: 7617533 ms
Cumulative Uptime: 0 ms
User Email: 
OS Name: Linux
OS Version: 0.0.0 Linux 4.4.0-31-generic #50~14.04.1-Ubuntu SMP Wed Jul 13 01:07:32 UTC 2016 x86_64
CPU Architecture: amd64
CPU Info: family 21 model 2 stepping 0

Stack Trace:
===========================

Thread 14 MAGIC SIGNATURE THREAD
Stack Quality88%Show frame trust levels
0x00007fbeea1346cd	(libc-2.19.so + 0x000eb6cd )	
0x00007fbeea0c22b8	(libc-2.19.so -fileops.c:1438 )	_IO_file_xsgetn
0x00007fbeea0b786e	(libc-2.19.so -iofread.c:42 )	_IO_fread
0x00005619a84ba42d	(chrome -./out/Release/../../base/files/file_util.cc:147 )	base::ReadFileToStringWithMaxSize(base::FilePath const&, std::string*, unsigned long)
0x00005619a96d357e	(chrome -./out/Release/../../device/usb/usb_service_linux.cc:135 )	device::UsbServiceLinux::FileThreadHelper::OnDeviceAdded(udev_device*)
0x00005619a96e159a	(chrome -./out/Release/../../base/callback.h:85 )	device::DeviceMonitorLinux::Enumerate(base::Callback<void (udev_device*), (base::internal::CopyMode)1, (base::internal::RepeatMode)1> const&)
0x00005619a96d513a	(chrome -./out/Release/../../device/usb/usb_service_linux.cc:111 )	device::UsbServiceLinux::FileThreadHelper::Start()
0x00005619a8530428	(chrome -./out/Release/../../base/callback.h:68 )	base::debug::TaskAnnotator::RunTask(char const*, base::PendingTask*)
0x00005619a84c6e8f	(chrome -./out/Release/../../base/message_loop/message_loop.cc:423 )	base::MessageLoop::RunTask(base::PendingTask*)
0x00005619a84c6967	(chrome -./out/Release/../../base/message_loop/message_loop.cc:434 )	base::MessageLoop::DoWork()
0x00005619a84c8bd4	(chrome -./out/Release/../../base/message_loop/message_pump_libevent.cc:218 )	base::MessagePumpLibevent::Run(base::MessagePump::Delegate*)
0x00005619a84e54af	(chrome -./out/Release/../../base/run_loop.cc:37 )	base::RunLoop::Run()
0x00005619a72309bd	(chrome -./out/Release/../../content/browser/browser_thread_impl.cc:251 )	content::BrowserThreadImpl::FileThreadRun(base::RunLoop*)
0x00005619a723064b	(chrome -./out/Release/../../content/browser/browser_thread_impl.cc:304 )	content::BrowserThreadImpl::Run(base::RunLoop*)
0x00005619a8505fbe	(chrome -./out/Release/../../base/threading/thread.cc:333 )	base::Thread::ThreadMain()
0x00005619a8502033	(chrome -./out/Release/../../base/threading/platform_thread_posix.cc:71 )	base::(anonymous namespace)::ThreadFunc(void*)
0x00007fbef06a1183	(libpthread-2.19.so + 0x00008183 )	

This crash is first started from 56.0.2924.28 and observed the spike in latest dev 58.0.3013.3 so far seeing 4 instances from 2 clients.

Link to the list of builds
---------------------------

https://crash.corp.google.com/browse?q=product.name%3D%27Chrome_Linux%27%20AND%20custom_data.ChromeCrashProto.ptype%3D%27browser%27%20AND%20custom_data.ChromeCrashProto.magic_signature_1.name%3D%27%5BShutdown%20File%20Thread%20hang%5D%20base%3A%3AReadFileToStringWithMaxSize%27&ignore_case=false&enable_rewrite=true&omit_field_name=&omit_field_value=&omit_field_opt=%3D

Change log 
-------------
https://chromium.googlesource.com/chromium/src/+log/58.0.2988.0..58.0.3013.0?pretty=fuller&n=10000

Review-Url: https://codereview.chromium.org/2688303002

reillyg@,could you please look into this issue if it is related to your change, else please route this to an appropriate dev person.

Thank You...