[inspector] expose V8InspectorSession::breakProgram in test harness.

test/inspector/debugger/inspector-break-api.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 breakProgram,(schedule|cancel)PauseOnNextStatement test API");
+
+InspectorTest.addScript(`
+function callBreakProgram() {
+  breakProgram('reason', JSON.stringify({a: 42}));
+}
+
+function foo() {
+  return 42;
+}`, 7, 26);
+
+InspectorTest.setupScriptMap();
+Protocol.Debugger.onPaused(message => {
+  InspectorTest.log('Stack:');
+  InspectorTest.logCallFrames(message.params.callFrames);
+  delete message.params.callFrames;
+  InspectorTest.log('Other data:');
+  InspectorTest.logMessage(message);
+  InspectorTest.log('');
+  Protocol.Debugger.resume();
+});
+
+Protocol.Debugger.enable();
+
+InspectorTest.runTestSuite([
+  function testBreakProgram(next) {
+    Protocol.Runtime.evaluate({ expression: 'callBreakProgram()'})
+      .then(next);
+  },
+
+  function testSchedulePauseOnNextStatement(next) {
+    schedulePauseOnNextStatement('reason', JSON.stringify({a: 42}));
+    Protocol.Runtime.evaluate({ expression: 'foo()//# sourceURL=expr1.js'})
+      .then(() => Protocol.Runtime.evaluate({
+        expression: 'foo()//# sourceURL=expr2.js'}))
+      .then(next);
+  },
+
+  function testCancelPauseOnNextStatement(next) {
+    schedulePauseOnNextStatement('reason', JSON.stringify({a: 42}));
+    cancelPauseOnNextStatement();
+    Protocol.Runtime.evaluate({ expression: 'foo()'})
+      .then(next);
+  }
+]);