[V8] Rename isolated() to getWorld(), rename worldForEnteredContextIfIsolated() to worldForEnteredContext()
https://bugs.webkit.org/show_bug.cgi?id=109039

Reviewed by Adam Barth.

This is a follow-up patch for r141983.
Rename methods for consistency.

No tests. No change in behavior.

* bindings/v8/DOMDataStore.cpp:
(WebCore::DOMDataStore::current):
* bindings/v8/DOMWrapperWorld.h:
(WebCore::DOMWrapperWorld::getWorld):
* bindings/v8/ScriptController.cpp:
(WebCore::ScriptController::shouldBypassMainWorldContentSecurityPolicy):
(WebCore::ScriptController::currentWorldContext):
* bindings/v8/V8Binding.h:
(WebCore::worldForEnteredContext):
* bindings/v8/WorldContextHandle.cpp:
(WebCore::WorldContextHandle::WorldContextHandle):
* bindings/v8/custom/V8DocumentCustom.cpp:
(WebCore::wrap):
* bindings/v8/custom/V8HTMLDocumentCustom.cpp:
(WebCore::wrap):
* bindings/v8/custom/V8SVGDocumentCustom.cpp:
(WebCore::wrap):
* bindings/v8/custom/V8XMLHttpRequestCustom.cpp:
(WebCore::V8XMLHttpRequest::constructorCallbackCustom):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@142424 268f45cc-cd09-0410-ab3c-d52691b4dbfc