Reviewed by Timothy Hatcher.

        Wrap primitive values (as objects) in InspectorController::wrap.

        https://bugs.webkit.org/show_bug.cgi?id=28983

        * inspector/InspectorController.cpp:
        (WebCore::InspectorController::wrapObject): objects of any type will be wrapped into proxies,
         only object proxies will have objectId.
        * inspector/front-end/ConsoleView.js:
        (WebInspector.ConsoleView.prototype.completions): there is InjectedScript.getCompletionsi
         that accepts an expression and returns possible completions. This way we don't need to wrap
         and unwrap the completions result into a proxy object.
        * inspector/front-end/InjectedScript.js:
        (InjectedScript.getCompletions):
        (InjectedScript.evaluate):
        (InjectedScript._evaluateOn):
        (InjectedScript.createProxyObject):
        * inspector/front-end/InjectedScriptAccess.js:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@48491 268f45cc-cd09-0410-ab3c-d52691b4dbfc