[debug] Add Eval scope type to inspector protocol

test/debugger/debug/debug-evaluate-locals-optimized-double.js

 // Copyright 2012 the V8 project authors. All rights reserved.
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 //
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-// Flags: --expose-debug-as debug --expose-gc --allow-natives-syntax
+// Flags: --expose-gc
 // Flags: --inline-construct
 
-// Get the Debug object exposed from the debug context global object.
 Debug = debug.Debug
 
 var listenerComplete = false;
 var exception = false;
 
 var testingConstructCall = false;
 
 var input = [
   {a: 1, b: 2},
   {a: 3, b: 4},
@@ skipping 151 matching lines @@
 new f(input.length - 1, 11.11, 12.12, "");
 
 // Make sure that the debug event listener was invoked.
 assertFalse(exception, "exception in listener " + exception)
 assertTrue(listenerComplete);
 
 //Throw away type information for next run.
 gc();
 
 Debug.setListener(null);