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

src/inspector/debugger_script_externs.js

 // Copyright 2016 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /** @typedef {{
         type: string,
         object: !Object,
         name: (string|undefined),
         startLocation: (!RawLocation|undefined),
         endLocation: (!RawLocation|undefined)
@@ skipping 13 matching lines @@
         this: !Object,
         scopeChain: !Array<!Scope>,
         functionLocation: (RawLocation|undefined),
         returnValue: (*|undefined)
     }} */
 var JavaScriptCallFrameDetails;
 
 /** @typedef {{
         contextId: function():number,
         thisObject: !Object,
-        evaluate: function(string):*,
+        evaluate: function(string, boolean):*,
         restart: function():undefined,
         setVariableValue: function(number, string, *):undefined,
         isAtReturn: boolean,
         details: function():!JavaScriptCallFrameDetails
     }} */
 var JavaScriptCallFrame;
 
 /**
  * @const
  */
@@ skipping 358 matching lines @@
 FrameMirror.prototype.allScopes = function(ignoreNestedScopes) {}
 
 /** @return {!FrameDetails} */
 FrameMirror.prototype.details = function() {}
 
 /** @return {!ScriptMirror} */
 FrameMirror.prototype.script = function() {}
 
 /**
  * @param {string} source
+ * @param {boolean} allowSideEffect
  */
-FrameMirror.prototype.evaluate = function(source) {}
+FrameMirror.prototype.evaluate = function(source, allowSideEffect) {}
 
 FrameMirror.prototype.restart = function() {}
 
 /** @param {number} index */
 FrameMirror.prototype.scope = function(index) {}
 
 
 /**
  * @interface
  * @extends {Mirror}
@@ skipping 29 matching lines @@
 ScopeMirror.prototype.setVariableValue = function(name, newValue) {}
 
 /**
  * @interface
  * @extends {Mirror}
  */
 function ContextMirror() {}
 
 /** @return {string|undefined} */
 ContextMirror.prototype.data = function() {}