[inspector] Refactor inspector test

test/inspector/debugger/framework-stepping.js

 // Copyright 2017 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.
 
 InspectorTest.log('Checks stepping with blackboxed frames on stack');
 
 InspectorTest.addScript(
     `
 function frameworkCall(funcs) {
   for (var f of funcs) f();
@@ skipping 29 matching lines @@
 InspectorTest.setupScriptMap();
 
 Protocol.Debugger.enable()
     .then(
         () => Protocol.Debugger.setBlackboxPatterns(
             {patterns: ['framework\.js']}))
     .then(() => InspectorTest.runTestSuite(testSuite));
 
 var testSuite = [
   function testStepIntoFromUser(next) {
-    utils.schedulePauseOnNextStatement('', '');
+    InspectorTest.contextGroup.schedulePauseOnNextStatement('', '');
     test('testStepFromUser()', [
       'print',                          // before testStepFromUser call
       'stepInto', 'stepInto', 'print',  // userFoo
       'stepInto', 'stepInto', 'print',  // userBoo
       'stepInto', 'stepInto', 'print'   // testStepFromUser
     ]).then(next);
   },
 
   function testStepOverFromUser(next) {
-    utils.schedulePauseOnNextStatement('', '');
+    InspectorTest.contextGroup.schedulePauseOnNextStatement('', '');
     test('testStepFromUser()', [
       'print',                          // before testStepFromUser call
       'stepInto', 'stepInto', 'print',  // userFoo
       'stepOver', 'stepOver', 'print',  // userBoo
       'stepOver', 'stepOver', 'print'   // testStepFromUser
     ]).then(next);
   },
 
   function testStepOutFromUser(next) {
-    utils.schedulePauseOnNextStatement('', '');
+    InspectorTest.contextGroup.schedulePauseOnNextStatement('', '');
     test('testStepFromUser()', [
       'print',                          // before testStepFromUser call
       'stepInto', 'stepInto', 'print',  // userFoo
       'stepOut', 'print'                // testStepFromUser
     ]).then(next);
   },
 
   function testStepIntoFromFramework(next) {
     test('testStepFromFramework()', [
       'print',              // frameworkBreakAndCall
@@ skipping 23 matching lines @@
       InspectorTest.logCallFrames(message.params.callFrames);
       InspectorTest.log('');
       action = actions.shift() || 'resume';
     }
     if (action) InspectorTest.log(`Executing ${action}...`);
     Protocol.Debugger[action]();
   });
   return Protocol.Runtime.evaluate(
       {expression: entryExpression + '//# sourceURL=expr.js'});
 }