Revert 162838 "Remove deprecated API usaged in SerializedScriptV..."

A serialized script value might get created in one isolate and is
then transferred to another isolate. The usage of AdjustAmountOfExternalMemory
is probably completely broken here.

Anyway, but the time m_isolate is used in the destructor, it might
already be gone.

> Remove deprecated API usaged in SerializedScriptValue.cpp
> 
> R=mkwst@chromium.org
> BUG=324225
> 
> Review URL: https://codereview.chromium.org/94933002

TBR=dslomov@chromium.org

Review URL: https://codereview.chromium.org/95663002

git-svn-id: svn://svn.chromium.org/blink/trunk@162854 bbb929c8-8fbe-4397-9dbb-9b2b20218538