https://bugs.webkit.org/show_bug.cgi?id=50877
        
Reviewed by Sam Weinig.

Hook up the unimplemented methods in WebInspectorProxyWin to get the web inspector
showing and usable in WebKit2 on Windows.

* UIProcess/WebInspectorProxy.cpp:
(WebKit::WebInspectorProxy::WebInspectorProxy): Initialize Windows-specific variables to 0.
* UIProcess/WebInspectorProxy.h:
* UIProcess/win/WebInspectorProxyWin.cpp:
(WebKit::WebInspectorProxy::registerInspectorViewWindowClass): Sets up the inspector view class.
(WebKit::WebInspectorProxy::InspectorViewWndProc): Calls through to the WebInspectorProxy's non-static
    WndProc.
(WebKit::WebInspectorProxy::wndProc): Handles WM_SIZE, WM_CLOSE, and WM_GETMINMAXINFO, the rest go to 
    ::DefWindowProc.
(WebKit::WebInspectorProxy::onSizeEvent): Resize the WKView that has the inspector page to match the
    outer window that was just resized.
(WebKit::WebInspectorProxy::onMinMaxInfoEvent): Set the minimum size the window can be resized to.
(WebKit::WebInspectorProxy::onCloseEvent): Hide the window, and call WebInspectorProxy::close.
(WebKit::WebInspectorProxy::platformCreateInspectorPage): Create a WKView and return its page.
(WebKit::WebInspectorProxy::platformOpen): Create an HWND for the inspector, put the inspector's WKView
    inside of it, and show the window.
(WebKit::WebInspectorProxy::platformClose): Destroy the inspector's window (which destroys the child WKView), 
    and 0 out instance variables.
(WebKit::WebInspectorProxy::inspectorPageURL): Finds inspector/inspector.html in the WebKit bundle.



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@73877 268f45cc-cd09-0410-ab3c-d52691b4dbfc