Adopt smart pointers for HistoryController

[rwlbuis]

bb678fe3190c9bff1825ccd303285a6c7d2c0cd0

Adopt smart pointers for HistoryController
https://bugs.webkit.org/show_bug.cgi?id=276067

Reviewed by NOBODY (OOPS!).

Adopt smart pointers for HistoryController based on [alpha.webkit.UncountedCallArgsChecker] warnings.

* Source/WebCore/loader/HistoryController.cpp:
(WebCore::HistoryController::saveDocumentAndScrollState):
(WebCore::HistoryController::updateForStandardLoad):
(WebCore::HistoryController::updateForClientRedirect):
(WebCore::HistoryController::recursiveUpdateForCommit):
(WebCore::HistoryController::updateBackForwardListClippedAtTarget):
(WebCore::HistoryController::pushState):
(WebCore::HistoryController::replaceState):

https://github.com/WebKit/WebKit/commit/bb678fe3190c9bff1825ccd303285a6c7d2c0cd0

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