Reviewed by Adam Barth.

        [v8] Inline hot methods for V8 to WebCore and back conversions
        https://bugs.webkit.org/show_bug.cgi?id=45270

        Inline fast paths of hot functions performing conversions from V8 wrappers
        to WebCore native objects and back.
        That slightly increases the size of binary (within 0.1% for both Ubuntu
        and Windows, but those builds are slightly different from official ones),
        but gives performance boost (3--5% on Windows, up to 8% on Ubuntu).

        * bindings/scripts/CodeGeneratorV8.pm:
        * bindings/v8/V8DOMWindowShell.cpp:
        (WebCore::V8DOMWindowShell::initContextIfNeeded):
        * bindings/v8/V8DOMWindowShell.h:
        * bindings/v8/V8DOMWrapper.cpp:
        (WebCore::V8DOMWrapper::getWrapperSlow):
        * bindings/v8/V8DOMWrapper.h:
        (WebCore::V8DOMWrapper::getWrapper):
        * bindings/v8/custom/V8NodeCustom.cpp:
        (WebCore::toV8Slow):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@66840 268f45cc-cd09-0410-ab3c-d52691b4dbfc