[Cocoa] Add plumbing for a couple more platform flags on ResourceRequest

[whsieh]

2092e71

[Cocoa] Add plumbing for a couple more platform flags on ResourceRequest
https://bugs.webkit.org/show_bug.cgi?id=255927
rdar://105895713

Reviewed by Tim Horton and Matthew Finkel.

Add plumbing for two flags on `ResourceRequest`: `PrivacyProxyFailClosedForUnreachableNonMainHosts`
and `UseNetworkConnectionIntegrity`, which both map to SPI properties on `NSURLRequest`. In a
subsequent patch, this will make it possible for WebKit clients to specify these flags on a URL
request when loading a web view, and have this state propagate to everywhere (including the resource
request used for performing preconnect).

* Source/WebCore/platform/network/ResourceRequestBase.cpp:
(WebCore::ResourceRequestBase::setAsIsolatedCopy):
(WebCore::ResourceRequestBase::setIsAppInitiated):
(WebCore::ResourceRequestBase::setPrivacyProxyFailClosedForUnreachableNonMainHosts):
(WebCore::ResourceRequestBase::setUseNetworkConnectionIntegrity):

Add support for the new flags here; this closely follows the existing pattern used to plumb whether
or not the request is app-initiated through `ResourceRequest`.

* Source/WebCore/platform/network/ResourceRequestBase.h:
(WebCore::ResourceRequestBase::RequestData::RequestData):
(WebCore::ResourceRequestBase::privacyProxyFailClosedForUnreachableNonMainHosts const):
(WebCore::ResourceRequestBase::useNetworkConnectionIntegrity const):
* Source/WebCore/platform/network/cf/ResourceRequest.h:
* Source/WebCore/platform/network/cf/ResourceRequestCFNet.cpp:
(WebCore::ResourceRequest::updateFromDelegatePreservingOldProperties):
* Source/WebCore/platform/network/cocoa/ResourceRequestCocoa.mm:
(WebCore::ResourceRequest::ResourceRequest):
(WebCore::ResourceRequest::getResourceRequestPlatformData const):
(WebCore::configureRequestWithData):

Add a new helper method to set some policy flags on the platform URL request, to avoid duplicating
this logic in the two methods below.

(WebCore::ResourceRequest::doUpdatePlatformRequest):
(WebCore::ResourceRequest::doUpdatePlatformHTTPBody):
* Source/WebKit/Shared/Cocoa/WebCoreArgumentCodersCocoa.serialization.in:
* Source/WebKit/Shared/WebCoreArgumentCoders.serialization.in:

Add IPC encoding/decoding support for the platform flags.

Canonical link: https://commits.webkit.org/263390@main

e1837a3

Misc	iOS, tvOS & watchOS	macOS	Linux	Windows
✅ 🧪 style	✅ 🛠 ios	✅ 🛠 mac	✅ 🛠 wpe	✅ 🛠 wincairo
✅ 🧪 bindings	✅ 🛠 ios-sim	✅ 🛠 mac-AS-debug	✅ 🧪 wpe-wk2
✅ 🧪 webkitperl	✅ 🧪 ios-wk2	✅ 🧪 api-mac	✅ 🛠 gtk
	✅ 🧪 ios-wk2-wpt	✅ 🧪 mac-wk1	🧪 gtk-wk2
	✅ 🧪 api-ios	✅ 🧪 mac-wk2	✅ 🧪 api-gtk
	✅ 🛠 tv	🧪 mac-AS-debug-wk2
	✅ 🛠 tv-sim	✅ 🧪 mac-wk2-stress
✅ 🛠 🧪 merge	✅ 🛠 watch
	✅ 🛠 watch-sim

[webkit-early-warning-system]

EWS run on previous version of this PR (hash 2ebc5d9)

Misc	iOS, tvOS & watchOS	macOS	Linux	Windows
✅ 🧪 style	✅ 🛠 ios	✅ 🛠 mac	✅ 🛠 wpe	✅ 🛠 wincairo
✅ 🧪 bindings	✅ 🛠 ios-sim	✅ 🛠 mac-AS-debug	✅ 🧪 wpe-wk2
✅ 🧪 webkitperl	✅ 🧪 ios-wk2	✅ 🧪 api-mac	✅ 🛠 gtk
	✅ 🧪 ios-wk2-wpt	✅ 🧪 mac-wk1	🧪 gtk-wk2
	✅ 🧪 api-ios	❌ 🧪 mac-wk2	✅ 🧪 api-gtk
	✅ 🛠 tv	✅ 🧪 mac-AS-debug-wk2
	✅ 🛠 tv-sim	✅ 🧪 mac-wk2-stress
	✅ 🛠 watch
	✅ 🛠 watch-sim

[sysrqb]

Otherwise, lgtm.

[whsieh]

Thanks for the reviews!

[webkit-early-warning-system]

EWS run on previous version of this PR (hash 4bc430a)

Misc	iOS, tvOS & watchOS	macOS	Linux	Windows
✅ 🧪 style	✅ 🛠 ios	❌ 🛠 mac	✅ 🛠 wpe	⏳ 🛠 wincairo
✅ 🧪 bindings	✅ 🛠 ios-sim	⏳ 🛠 mac-AS-debug	🧪 wpe-wk2
✅ 🧪 webkitperl	⏳ 🧪 ios-wk2	❌ 🧪 api-mac	✅ 🛠 gtk
	⏳ 🧪 ios-wk2-wpt	❌ 🧪 mac-wk1	⏳ 🧪 gtk-wk2
⏳ 🛠 🧪 jsc	🧪 api-ios	❌ 🧪 mac-wk2	🧪 api-gtk
⏳ 🛠 🧪 jsc-arm64	⏳ 🛠 tv	⏳ 🧪 mac-AS-debug-wk2
	❌ 🛠 tv-sim	❌ 🧪 mac-wk2-stress
	⏳ 🛠 watch
	❌ 🛠 watch-sim

[webkit-early-warning-system]

EWS run on current version of this PR (hash e1837a3)

Misc	iOS, tvOS & watchOS	macOS	Linux	Windows
✅ 🧪 style	✅ 🛠 ios	✅ 🛠 mac	✅ 🛠 wpe	✅ 🛠 wincairo
✅ 🧪 bindings	✅ 🛠 ios-sim	✅ 🛠 mac-AS-debug	✅ 🧪 wpe-wk2
✅ 🧪 webkitperl	✅ 🧪 ios-wk2	✅ 🧪 api-mac	✅ 🛠 gtk
	✅ 🧪 ios-wk2-wpt	✅ 🧪 mac-wk1	🧪 gtk-wk2
	✅ 🧪 api-ios	✅ 🧪 mac-wk2	✅ 🧪 api-gtk
	✅ 🛠 tv	🧪 mac-AS-debug-wk2
	✅ 🛠 tv-sim	✅ 🧪 mac-wk2-stress
✅ 🛠 🧪 merge	✅ 🛠 watch
	✅ 🛠 watch-sim

[webkit-commit-queue]

Committed 263390@main (2092e71): https://commits.webkit.org/263390@main

Reviewed commits have been landed. Closing PR #13150 and removing active labels.