[inspector] support for nested scheduled breaks

test/inspector/debugger/framework-nested-scheduled-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.
+
+print('Checks nested scheduled break in framework code.');
+
+InspectorTest.addScript(`
+function frameworkCall(callback) {
+  callWithScheduledBreak(doFrameworkWork.bind(null, callback), 'doFrameworkWork', '');
+}
+
+function doFrameworkWork(callback) {
+  callWithScheduledBreak(() => 42, '() => 42', '');
+  callback();
+}
+//# sourceURL=framework.js`, 7, 26);
+
+InspectorTest.addScript(`
+function testFunction() {
+  callWithScheduledBreak(frameworkCall.bind(null, foo), 'frameworkCall', '');
+}
+
+function foo() {
+  breakProgram('break in user code', '');
+  return 42;
+}
+//# sourceURL=user.js`, 18, 26);
+
+InspectorTest.setupScriptMap();
+Protocol.Debugger.onPaused(message => {
+  InspectorTest.log('break reason: ' + message.params.reason);
+  InspectorTest.logCallFrames(message.params.callFrames);
+  Protocol.Debugger.resume();
+});
+Protocol.Debugger.enable()
+  .then(() => Protocol.Debugger.setBlackboxPatterns({patterns: ['framework\.js']}))
+  .then(() => Protocol.Runtime.evaluate({ expression: 'testFunction()//# sourceURL=expr.js'}))
+  .then(InspectorTest.logMessage)
+  .then(InspectorTest.completeTest);