Bug 207865

WebPageProxy::dispatchDidReceiveEditorStateAfterFocus() is called either when the WebKit receives a layer commit message or an editor state changed messaged, which may or may not be after an element is focused. Note that for all non-iOS ports WebPageProxy::dispatchDidReceiveEditorStateAfterFocus() does nothing. For iOS the implementation currently conditionalizes itself on m_waitingForPostLayoutEditorStateUpdateAfterFocusingElement because iOS defers zooming and scrolling when an element is focused until it receives an editor state update. But that is just an implementation detail of iOS. Fact remains that WebPageProxy::dispatchDidReceiveEditorStateAfterFocus() is called more often that after an element is focused. Ideally, the iOS implementation of WebPageProxy::dispatchDidReceiveEditorStateAfterFocus() should move from WebPageProxyIOS.mm to WebPageProxy.cpp. For now, let's rename it so that it better describes its purpose.