harmony-scoping: Implement debugger support for script scope.

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

Index: test/mjsunit/debug-evaluate-locals-optimized-double.js
diff --git a/test/mjsunit/debug-evaluate-locals-optimized-double.js b/test/mjsunit/debug-evaluate-locals-optimized-double.js
index 6696ec5ecd0651219fcff561ce9467c0ca860d86..84b7e20fe69cf2e3129ae2baa0f4d49b471d24ae 100644
--- a/test/mjsunit/debug-evaluate-locals-optimized-double.js
+++ b/test/mjsunit/debug-evaluate-locals-optimized-double.js
@@ -89,9 +89,10 @@ function listener(event, exec_state, event_data, data) {
           }
 
           // All frames except the bottom one have two scopes.
-          assertEquals(2, frame.scopeCount());
+          assertEquals(3, frame.scopeCount());
           assertEquals(debug.ScopeType.Local, frame.scope(0).scopeType());
-          assertEquals(debug.ScopeType.Global, frame.scope(1).scopeType());
+          assertEquals(debug.ScopeType.Script, frame.scope(1).scopeType());
+          assertEquals(debug.ScopeType.Global, frame.scope(2).scopeType());
 
           Object.keys(expected_locals).forEach(function (name) {
             assertEquals(expected_locals[name],
@@ -134,8 +135,9 @@ function listener(event, exec_state, event_data, data) {
                        frame.evaluate(arguments_sum).value());
         } else {
           // The bottom frame only have the global scope.
-          assertEquals(1, frame.scopeCount());
-          assertEquals(debug.ScopeType.Global, frame.scope(0).scopeType());
+          assertEquals(2, frame.scopeCount());
+          assertEquals(debug.ScopeType.Script, frame.scope(0).scopeType());
+          assertEquals(debug.ScopeType.Global, frame.scope(1).scopeType());
         }
 
         // Check the frame function.