Test for Runtime.globalLexicalScopeVariablesNames
Running 'let a = 1'
Values:
a = 1

Running 'let b = 2'
Values:
a = 1
b = 2

Running 'let b = 3'
Values:
a = 1
b = 2

Running 'const c = 4'
Values:
a = 1
b = 2
c = 4

Running 'var d = 5'
(should not be in list of scoped variables)
Values:
a = 1
b = 2
c = 4

Running 'class Foo{}'
Values:
a = 1
b = 2
c = 4
Foo =
{
    className : Function
    description : class Foo{}
    objectId : <objectId>
    type : function
}

Adding script with scope variables
Values:
a = 1
b = 2
c = 4
Foo =
{
    className : Function
    description : class Foo{}
    objectId : <objectId>
    type : function
}
e = 1
f = 2
g = 3
Boo =
{
    className : Function
    description : class Boo {}
    objectId : <objectId>
    type : function
}

