Started on:
https://build.chromium.org/p/chromium.memory.fyi/builders/Windows%20Content%20Browser%20%28DrMemory%20full%29%20%286%29/builds/3767

Probably r396766 (https://codereview.chromium.org/2013733002)? amistry@, can you look into this?

UNINITIALIZED READ: reading 0x03213340-0x03213348 8 byte(s) within 0x03213340-0x0321334c
# 0 system call NtFsControlFile FILE_PIPE_WAIT_FOR_BUFFER Timeout+NameLength
# 1 KERNELBASE.dll!WaitNamedPipeW                                             +0x2c6    (0x75b883cc <KERNELBASE.dll+0x83cc>)
# 2 mojo_system_impl.dll!mojo::edk::NamedPlatformChannelPair::PassClientHandleFromParentProcess [mojo\edk\embedder\named_platform_channel_pair_win.cc:90]
# 3 content.dll!content::`anonymous namespace'::InitializeMojoIPCChannel       [content\child\child_thread_impl.cc:240]
# 4 content.dll!content::ChildThreadImpl::Init                                 [content\child\child_thread_impl.cc:399]
# 5 content.dll!content::ChildThreadImpl::ChildThreadImpl                      [content\child\child_thread_impl.cc:340]
# 6 content.dll!content::UtilityThreadImpl::UtilityThreadImpl                  [content\utility\utility_thread_impl.cc:42]
# 7 content.dll!content::UtilityMain                                           [content\utility\utility_main.cc:40]
# 8 content.dll!content::RunNamedProcessTypeMain                               [content\app\content_main_runner.cc:420]
# 9 content.dll!content::ContentMainRunnerImpl::Run                            [content\app\content_main_runner.cc:787]
#10 content.dll!content::ContentMain                                           [content\app\content_main.cc:20]
#11 content::LaunchTests                                                       [content\public\test\test_launcher.cc:523]
#12 main                                                                       [content\test\content_test_launcher.cc:131]