Nondeterminism in NavigationScheduler should be mediated

[burg]

Sometimes, navigation of a frame is asynchronously scheduled through NavigationScheduler::schedule(). This can be of variable-length delay, and has lots of other logic. So, instead of going through EventSender, this class should directly store and load nondeterministic timings.

The implementation should look similar to ScriptRunner.

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Example stack trace:

ASSERTION FAILED: withinInputExtent()
/Users/burg/repos/timelapse/Source/WebCore/replay/CaptureInputIterator.cpp(98) : virtual void WebCore::CaptureInputIterator::incrementExecutionTicks()
1   0x111806270 WTFCrash
2   0x114248815 WebCore::CaptureInputIterator::incrementExecutionTicks()
3   0x1142403b2 WebCore::ReplayController::willDispatchEvent(WebCore::Event const&, WebCore::Frame*, WebCore::PositionMark const&)
4   0x1142465c4 WebCore::InspectorReplayAgent::willDispatchEvent(WebCore::Event const&, WebCore::Frame*)
5   0x113248f78 WebCore::InspectorInstrumentation::willDispatchEventOnWindowImpl(WebCore::InstrumentingAgents*, WebCore::Event const&, WebCore::DOMWindow*)
6   0x112ce619a WebCore::InspectorInstrumentation::willDispatchEventOnWindow(WebCore::Frame*, WebCore::Event const&, WebCore::DOMWindow*)
7   0x112cdad13 WebCore::DOMWindow::dispatchEvent(WTF::PassRefPtr<WebCore::Event>, WTF::PassRefPtr<WebCore::EventTarget>)
8   0x114238b72 WebCore::AsyncEventProxy::dispatchEvent(WTF::PassRefPtr<WebCore::Event>, WTF::PassRefPtr<WebCore::EventTarget>)
9   0x114238738 WebCore::AsyncEventProxy::dispatchAsyncEvent(WTF::PassRefPtr<WebCore::Event>, WTF::PassRefPtr<WebCore::EventTarget>, bool)
10  0x112ce1d00 WebCore::DOMWindow::dispatchAsyncEvent(WTF::PassRefPtr<WebCore::Event>, WTF::PassRefPtr<WebCore::EventTarget>)
11  0x112e6bdb3 WebCore::FrameLoader::handleBeforeUnloadEvent(WebCore::Chrome&, WebCore::FrameLoader*)
12  0x112e6bb93 WebCore::FrameLoader::shouldClose()
13  0x112e66d5d WebCore::FrameLoader::continueLoadAfterNavigationPolicy(WebCore::ResourceRequest const&, WTF::PassRefPtr<WebCore::FormState>, bool)
14  0x112e67117 WebCore::FrameLoader::callContinueLoadAfterNavigationPolicy(void*, WebCore::ResourceRequest const&, WTF::PassRefPtr<WebCore::FormState>, bool)
15  0x1139f236c WebCore::PolicyCallback::call(bool)
16  0x1139f339a WebCore::PolicyChecker::continueAfterNavigationPolicy(WebCore::PolicyAction)
17  0x1139f8e9e WebCore::PolicyChecker::checkNavigationPolicy(WebCore::ResourceRequest const&, WebCore::DocumentLoader*, WTF::PassRefPtr<WebCore::FormState>, void (*)(void*, WebCore::ResourceRequest const&, WTF::PassRefPtr<WebCore::FormState>, bool), void*)::$_0::operator()(WebCore::PolicyAction) const
18  0x1139f8e6e std::__1::__function::__func<WebCore::PolicyChecker::checkNavigationPolicy(WebCore::ResourceRequest const&, WebCore::DocumentLoader*, WTF::PassRefPtr<WebCore::FormState>, void (*)(void*, WebCore::ResourceRequest const&, WTF::PassRefPtr<WebCore::FormState>, bool), void*)::$_0, std::__1::allocator<WebCore::PolicyChecker::checkNavigationPolicy(WebCore::ResourceRequest const&, WebCore::DocumentLoader*, WTF::PassRefPtr<WebCore::FormState>, void (*)(void*, WebCore::ResourceRequest const&, WTF::PassRefPtr<WebCore::FormState>, bool), void*)::$_0>, void (WebCore::PolicyAction)>::operator()(WebCore::PolicyAction&&)
19  0x10fc5509c std::__1::function<void (WebCore::PolicyAction)>::operator()(WebCore::PolicyAction) const
20  0x10fc5b6ec WebKit::WebFrameLoaderClient::dispatchDecidePolicyForNavigationAction(WebCore::NavigationAction const&, WebCore::ResourceRequest const&, WTF::PassRefPtr<WebCore::FormState>, std::__1::function<void (WebCore::PolicyAction)>)
21  0x1139f2e09 WebCore::PolicyChecker::checkNavigationPolicy(WebCore::ResourceRequest const&, WebCore::DocumentLoader*, WTF::PassRefPtr<WebCore::FormState>, void (*)(void*, WebCore::ResourceRequest const&, WTF::PassRefPtr<WebCore::FormState>, bool), void*)
22  0x112e66a3c WebCore::FrameLoader::loadWithDocumentLoader(WebCore::DocumentLoader*, WebCore::FrameLoadType, WTF::PassRefPtr<WebCore::FormState>)
23  0x112e65ce0 WebCore::FrameLoader::loadWithNavigationAction(WebCore::ResourceRequest const&, WebCore::NavigationAction const&, bool, WebCore::FrameLoadType, WTF::PassRefPtr<WebCore::FormState>)
24  0x112e63e79 WebCore::FrameLoader::loadURL(WebCore::URL const&, WTF::String const&, WTF::String const&, bool, WebCore::FrameLoadType, WTF::PassRefPtr<WebCore::Event>, WTF::PassRefPtr<WebCore::FormState>)
25  0x112e5fa2b WebCore::FrameLoader::loadFrameRequest(WebCore::FrameLoadRequest const&, bool, bool, WTF::PassRefPtr<WebCore::Event>, WTF::PassRefPtr<WebCore::FormState>, WebCore::ShouldSendReferrer)
26  0x112e5f306 WebCore::FrameLoader::urlSelected(WebCore::FrameLoadRequest const&, WTF::PassRefPtr<WebCore::Event>, bool, bool, WebCore::ShouldSendReferrer, WebCore::ShouldReplaceDocumentIfJavaScriptURL)
27  0x112e5f098 WebCore::FrameLoader::changeLocation(WebCore::SecurityOrigin*, WebCore::URL const&, WTF::String const&, bool, bool, bool)
28  0x11392d302 WebCore::ScheduledURLNavigation::fire(WebCore::Frame*)
29  0x11392a816 WebCore::NavigationScheduler::timerFired(WebCore::Timer<WebCore::NavigationScheduler>*)
30  0x11392c7a3 WebCore::Timer<WebCore::NavigationScheduler>::fired()
31  0x114098963 WebCore::ThreadTimers::sharedTimerFiredInternal()