Make exception thrown via v8 public API propagate to v8::TryCatch as JS thrown except...

Make exception thrown via v8 public API propagate to v8::TryCatch as JS thrown exceptions do.

Correctly process failures which can be returned by Object::GetProperty
when performing GetRealNamedProperty* queries.

Callback properties can produce exceptions so we need to wrap access to them
into exception checks.  However, despite of many other methods with exception
checks, property access doesn't mandatroy go via JavaScript and hence we
need to inject code to propagate exception to public API TryCatch handlers.

Review URL: http://codereview.chromium.org/6397011

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@7258 ce2b1a6d-e550-0410-aec6-3dcde31c8c00