Make the docked Web Inspector use autoresizing masks so the view doesn't jitter when

Make the docked Web Inspector use autoresizing masks so the view doesn't jitter when
resizing the window.

https://webkit.org/b/86765

Reviewed by John Sullivan.

* UIProcess/mac/WebInspectorProxyMac.mm:
(-[WKWebInspectorProxyObjCAdapter close]): Added. Zero out _inspectorProxy.
(-[WKWebInspectorProxyObjCAdapter inspectedViewFrameDidChange:]): Preform the work on a delay to
prevent interfering with Cocoa's resizing.
(WebKit::WebInspectorProxy::createInspectorWindow): Added setAutoresizingMask: call.
(WebKit::WebInspectorProxy::platformCreateInspectorPage): Removed setAutoresizingMask: call.
createInspectorWindow and platformAttach do this now.
(WebKit::WebInspectorProxy::platformDidClose): Call close on WKWebInspectorProxyObjCAdapter.
(WebKit::WebInspectorProxy::platformAttach): Added setAutoresizingMask: call.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@117495 268f45cc-cd09-0410-ab3c-d52691b4dbfc