https://bugs.webkit.org/show_bug.cgi?id=72339

Reviewed by Gavin Barraclough.
        
Renamed copyRegisters => tearOff to match bytecode and other terminology.
        
Renamed setActivation => didTearOffActivation to indicate that this is a
notification the object may choose to ignore. Moved "Should I ignore?"
code into the arguments object to avoid duplication elsewhere.

* interpreter/Interpreter.cpp:
(JSC::Interpreter::unwindCallFrame):
(JSC::Interpreter::privateExecute):
(JSC::Interpreter::retrieveArguments):
* jit/JITStubs.cpp:
(JSC::DEFINE_STUB_FUNCTION):
* runtime/Arguments.h:
(JSC::Arguments::createAndTearOff):
(JSC::Arguments::didTearOffActivation):
(JSC::Arguments::finishCreationButDontTearOff):
(JSC::Arguments::finishCreation):
(JSC::Arguments::finishCreationAndTearOff):
(JSC::Arguments::tearOff):

* runtime/JSActivation.h:
(JSC::JSActivation::tearOff): Moved Activation's code into its own header
because that's where it belongs.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@100224 268f45cc-cd09-0410-ab3c-d52691b4dbfc