[test/inspector] remove any usage of v8::Extension

test/inspector/debugger/framework-break.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.
 // Flags: --allow-natives-syntax
 
 InspectorTest.log('Checks that breaks in framework code correctly processed.');
 
 InspectorTest.addScript(`
 function frameworkAssert() {
   console.assert(false);
@@ skipping 12 matching lines @@
 
 function breakpoint() {
   return 239;
 }
 
 function debuggerStatement() {
   debugger;
 }
 
 function syncDOMBreakpoint() {
-  breakProgram('', '');
+  inspector.breakProgram('', '');
 }
 
 function asyncDOMBreakpoint() {
   return 42;
 }
 
 function throwCaughtSyntaxError() {
   try {
     eval('}');
   } catch (e) {
@@ skipping 181 matching lines @@
             () => Protocol.Runtime.evaluate(
                 {expression: 'throwFromJSONParse()//# sourceURL=framework.js'}))
         .then(() => InspectorTest.log('> mixed, top frame in framework:'))
         .then(
             () => Protocol.Runtime.evaluate(
                 {expression: 'throwFromJSONParse()//# sourceURL=user.js'}))
         .then(() => Protocol.Debugger.setPauseOnExceptions({state: 'none'}))
         .then(next);
   }
 ]);