[debug] [reland] Consistently use script from FrameMirror

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 26 matching lines @@
         functionName: string,
         location: !RawLocation,
         this: !Object,
         scopeChain: !Array<!Scope>,
         functionLocation: (RawLocation|undefined),
         returnValue: (*|undefined)
     }} */
 var JavaScriptCallFrameDetails;
 
 /** @typedef {{
-        sourceID: function():(number|undefined),
+        sourceID: function():(number),
         line: function():number,
         column: function():number,
         thisObject: !Object,
         evaluate: function(string):*,
         restart: function():undefined,
         setVariableValue: function(number, string, *):undefined,
         isAtReturn: boolean,
         details: function():!JavaScriptCallFrameDetails
     }} */
 var JavaScriptCallFrame;
@@ skipping 223 matching lines @@
 
 /** @interface */
 function FrameDetails() {}
 
 /** @return {!Object} */
 FrameDetails.prototype.receiver = function() {}
 
 /** @return {function()} */
 FrameDetails.prototype.func = function() {}
 
+/** @return {!Object} */
+FrameDetails.prototype.script = function() {}
+
 /** @return {boolean} */
 FrameDetails.prototype.isAtReturn = function() {}
 
 /** @return {number} */
 FrameDetails.prototype.sourcePosition = function() {}
 
 /** @return {*} */
 FrameDetails.prototype.returnValue = function() {}
 
 /** @return {number} */
@@ skipping 158 matching lines @@
 
 /**
  * @param {boolean=} ignoreNestedScopes
  * @return {!Array<!ScopeMirror>}
  */
 FrameMirror.prototype.allScopes = function(ignoreNestedScopes) {}
 
 /** @return {!FrameDetails} */
 FrameMirror.prototype.details = function() {}
 
+/** @return {!ScriptMirror} */
+FrameMirror.prototype.script = function() {}
+
 /**
  * @param {string} source
  * @param {boolean} disableBreak
  */
 FrameMirror.prototype.evaluate = function(source, disableBreak) {}
 
 FrameMirror.prototype.restart = function() {}
 
 /** @param {number} index */
 FrameMirror.prototype.scope = function(index) {}
@@ skipping 34 matching lines @@
 ScopeMirror.prototype.setVariableValue = function(name, newValue) {}
 
 /**
  * @interface
  * @extends {Mirror}
  */
 function ContextMirror() {}
 
 /** @return {string|undefined} */
 ContextMirror.prototype.data = function() {}