We now follow the same logic as Mac WebKit for displaying the Inspect Element item:
            1) If DisableWebKitDeveloperExtras is set to true, don't display it
            2) If not, and we're in a debug build, display it
            3) If not, and we're in a release build, display it if
               WebKitDeveloperExtras is set to true

        Reviewed by Ada.

        * Interfaces/IWebPreferencesPrivate.idl: Added.
        * WebKit.vcproj/Interfaces.vcproj: Add new IWebPreferencesPrivate.idl
        file to project.
        * WebKit.vcproj/WebKitGUID.vcproj: Added generated .c file for
        IWebPreferencesPrivate to project.
        * WebPreferenceKeysPrivate.h: Added new keys.
        * WebPreferences.cpp: Added IID_WebPreferences.
        (WebPreferences::postPreferencesChangesNotification): Added an explicit
        cast needed now that WebPreferences implements two interfaces.
        (WebPreferences::QueryInterface): Added new cases.
        (WebPreferences::setDeveloperExtrasEnabled): Added.
        (WebPreferences::developerExtrasEnabled): Added.
        (WebPreferences::developerExtrasDisabledByOverride): Added.
        * WebPreferences.h: Now implements IWebPreferencesPrivate.
        * WebView.cpp:
        (WebView::updateWebCoreSettingsFromPreferences): Call developerExtrasEnabled.
        (WebView::developerExtrasEnabled): Ported from -[WebView _developerExtrasEnabled].
        * WebView.h:


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@25140 268f45cc-cd09-0410-ab3c-d52691b4dbfc