Made a generic ScriptState class. Not all the functions that use ScriptState are genericized, so be careful.
Removed some logs.
Fixed a crash when reloading a page.
Moved some static, global functions into the ScriptState class.
Put the ScriptCallStackFactory methods inside the ScriptState.
Moved some things around. Added RBScriptState.
Added support for Ruby in SerializedScriptValue.
Made a generic ScheduledAction class.