When running views_mus_unittests, a number of tests (usually among the first few run) fail with the following crash:

[23487:23487:0526/000055:319319402812:FATAL:bitmap_uploader.cc(52)] Check failed: gles2_context_->Initialize().
#0 0x000000539e31 __interceptor_backtrace
#1 0x7f5fdd0165d3 base::debug::StackTrace::StackTrace()
#2 0x7f5fdd078ebb logging::LogMessage::~LogMessage()
#3 0x7f5fd64c2e75 bitmap_uploader::BitmapUploader::Init()
#4 0x7f5fdd40bd51 views::PlatformWindowMus::PlatformWindowMus()
#5 0x7f5fdd4209f9 views::WindowTreeHostMus::WindowTreeHostMus()
#6 0x7f5fdd3fba7b views::NativeWidgetMus::NativeWidgetMus()
#7 0x7f5fdd41cb56 views::WindowManagerConnection::CreateNativeWidgetMus()
#8 0x7f5fdb1a0be1 views::Widget::Init()
#9 0x00000075fc52 views::test::MenuControllerTest::Init()
#10 0x000001501437 testing::Test::Run()
#11 0x000001503914 testing::TestInfo::Run()
#12 0x0000015046f3 testing::TestCase::Run()
#13 0x000001518e7a testing::internal::UnitTestImpl::RunAllTests()
#14 0x0000015184bc testing::UnitTest::Run()
#15 0x000000d0e7f2 base::TestSuite::Run()
#16 0x000000d35d02 base::(anonymous namespace)::LaunchUnitTestsInternal()
#17 0x000000d3598d base::LaunchUnitTests()
#18 0x000000b68c95 views::ViewsTestSuite::RunTests()
#19 0x0000005d6de7 MasterProcessMain()
#20 0x000000cc44a9 main
#21 0x7f5fd67a6ec5 __libc_start_main
#22 0x0000004fb266 <unknown>

This happens fairly reliably in local builds, and also happen in almost every run in the trybots too (e.g. https://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_rel_ng/builds/235929/steps/views_mus_unittests%20%28with%20patch%29%20on%20Ubuntu-12.04/logs/stdio). The tests do pass when run a second time, which is the trybot isn't completely broken yet.

Peng: perhaps you have insights?