[debugger] expose side-effect free evaluate to inspector.

src/inspector/debugger-script.js

Index: src/inspector/debugger-script.js
diff --git a/src/inspector/debugger-script.js b/src/inspector/debugger-script.js
index 871cea154cda7be3bcf95399c34278800212382f..8bd0f030f4b85b30612ef084be1b5ba7058cb8cf 100644
--- a/src/inspector/debugger-script.js
+++ b/src/inspector/debugger-script.js
@@ -463,11 +463,12 @@ DebuggerScript._frameMirrorToJSCallFrame = function(frameMirror)
 
     /**
      * @param {string} expression
+     * @param {boolean} allowSideEffect
      * @return {*}
      */
-    function evaluate(expression)
+    function evaluate(expression, allowSideEffect)
     {
-        return frameMirror.evaluate(expression).value();
+        return frameMirror.evaluate(expression, allowSideEffect).value();
     }
 
     /** @return {undefined} */