https://bugs.webkit.org/show_bug.cgi?id=92064

Reviewed by Kentaro Hara.

Some constructors missed to use *explicit* keyword. They need to be added
*explicit* keyword to contructor which has a parameter in order to avoid
implicit type conversion.

No new tests. Covered by existing tests.

* bridge/IdentifierRep.h:
(WebCore::IdentifierRep::IdentifierRep):
* history/BackForwardListImpl.h:
(BackForwardListImpl):
* history/CachedFrame.h:
(CachedFrame):
* history/HistoryItem.h:
(HistoryItem):
* loader/DocumentWriter.h:
(DocumentWriter):
* loader/FrameNetworkingContext.h:
(WebCore::FrameNetworkingContext::FrameNetworkingContext):
* loader/HistoryController.h:
* loader/ImageLoader.h:
(ImageLoader):
* loader/LinkLoader.h:
(LinkLoader):
* loader/MainResourceLoader.h:
(MainResourceLoader):
* loader/NavigationAction.h:
(NavigationAction):
* loader/NavigationScheduler.h:
(NavigationScheduler):
* loader/PolicyChecker.h:
(PolicyChecker):
* loader/SubframeLoader.h:
(SubframeLoader):
* loader/ThreadableLoaderClientWrapper.h:
(WebCore::ThreadableLoaderClientWrapper::ThreadableLoaderClientWrapper):
* plugins/PluginData.h:
(PluginData):
* plugins/PluginViewBase.h:
(WebCore::PluginViewBase::PluginViewBase):


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@123438 268f45cc-cd09-0410-ab3c-d52691b4dbfc