Make windows bots green.

[JoelEinbinder]

Blocking #678

Looks like some user-data-dir bugs and some line ending bugs in Chromium. Some failures to launch in firefox, and a webkit crash.

[JoelEinbinder]

Status update:

Chromium is looking ok, with some behavior we should fix around cookies. #717

Firefox is looking ok.

WebKit for Windows is not looking ok. It has a lot of flakly tests, and I cannot get it to complete a full run.
Almost every test can crash. #797 should fix some of the crashes for worker tests, but there still appear to be more.
Almost every test can fail with a missing page.mainFrame(), #798
Everything that uses waitForLoadState can time out. A few random tests time out every run.
So far none of the problems have actually been Windows specific. They appear to be races that could happen on any platform, but appear most often on Windows due to its unique timings.

[pavelfeldman]

Unhandled exception at 0x00007FFE3C85262B (vrfcore.dll) in MiniBrowser.exe: 0xC000041D: An unhandled exception was encountered during a user callback.

verifier.dll!AVrfpDphReportCorruptedBlock�()
verifier.dll!AVrfpDphCheckNormalFreeHeapBlock�()
verifier.dll!AVrfpDphRemoveEntry�()
verifier.dll!AVrfpDphRemoveFromDelayFree�()
verifier.dll!AVrfpDphPlaceOnDelayFree�()
verifier.dll!AVrfDebugPageHeapFree�()
ntdll.dll!RtlDebugFreeHeap�()
ntdll.dll!RtlpFreeHeap()
ntdll.dll!RtlpFreeHeapInternal()
ntdll.dll!RtlFreeHeap()
vrfcore.dll!VfCoreRtlFreeHeap(void *,unsigned long,void *)
vfbasics.dll!AVrfpRtlFreeHeap�()
ucrtbase.dll!_free_base()
cairo.dll!00007ffe097e2e1c()
cairo.dll!00007ffe098300b7()
WebKit2.dll!WebCore::BackingStoreBackendCairoImpl::`scalar deleting destructor'(unsigned int)
WebKit2.dll!WebKit::DrawingAreaProxyCoordinatedGraphics::`scalar deleting destructor'(unsigned int)
[Inline Frame] WebKit2.dll!std::default_delete<WebKit::DrawingAreaProxy>::operator()(WebKit::DrawingAreaProxy *) Line 1765
	at C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.24.28314\include\memory(1765)
[Inline Frame] WebKit2.dll!std::unique_ptr<WebKit::DrawingAreaProxy,std::default_delete<WebKit::DrawingAreaProxy>>::reset(WebKit::DrawingAreaProxy *) Line 1908
	at C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.24.28314\include\memory(1908)
[Inline Frame] WebKit2.dll!std::unique_ptr<WebKit::DrawingAreaProxy,std::default_delete<WebKit::DrawingAreaProxy>>::operator=(void *) Line 1813
	at C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.24.28314\include\memory(1813)
WebKit2.dll!WebKit::WebPageProxy::resetState(WebKit::WebPageProxy::ResetStateReason resetStateReason) Line 7487
	at C:\WebKit\Source\WebKit\UIProcess\WebPageProxy.cpp(7487)
WebKit2.dll!WebKit::WebPageProxy::close() Line 1088
	at C:\WebKit\Source\WebKit\UIProcess\WebPageProxy.cpp(1088)
[Inline Frame] WebKit2.dll!WebKit::WebView::close() Line 801
	at C:\WebKit\Source\WebKit\UIProcess\win\WebView.cpp(801)
WebKit2.dll!WebKit::WebView::wndProc(HWND__ * hWnd, unsigned int message, unsigned __int64 wParam, __int64 lParam) Line 119
	at C:\WebKit\Source\WebKit\UIProcess\win\WebView.cpp(119)
WebKit2.dll!WebKit::WebView::WebViewWndProc(HWND__ * hWnd, unsigned int message, unsigned __int64 wParam, __int64 lParam) Line 94
	at C:\WebKit\Source\WebKit\UIProcess\win\WebView.cpp(94)
[External Code]
WebKit2.dll!WebCore::WindowMessageBroadcaster::SubclassedWndProc(HWND__ * hwnd, unsigned int message, unsigned __int64 wParam, __int64 lParam) Line 123
	at C:\WebKit\Source\WebCore\platform\win\WindowMessageBroadcaster.cpp(123)

[pavelfeldman]

[pavelfeldman]

Hats off to @fujii for resolving this problem upstream!