[inspector] support setTimeout in Debugger.scheduleStepIntoAsync method

test/inspector/debugger/schedule-step-into-async-set-timeout.js

Index: test/inspector/debugger/schedule-step-into-async-set-timeout.js
diff --git a/test/inspector/debugger/schedule-step-into-async-set-timeout.js b/test/inspector/debugger/schedule-step-into-async-set-timeout.js
new file mode 100644
index 0000000000000000000000000000000000000000..ae87b6c8828111a00f3d2d74050520c154832ba6
--- /dev/null
+++ b/test/inspector/debugger/schedule-step-into-async-set-timeout.js
@@ -0,0 +1,66 @@
+// 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 Debugger.scheduleStepIntoAsync with setTimeout.');
+InspectorTest.setupScriptMap();
+Protocol.Debugger.enable();
+InspectorTest.runAsyncTestSuite([
+  async function testSetTimeout() {
+    Protocol.Runtime.evaluate({expression: 'debugger; setTimeout(() => 1, 0);'});
+    await Protocol.Debugger.oncePaused();
+    Protocol.Debugger.stepOver();
+    await waitPauseAndDumpLocation();
+    Protocol.Debugger.scheduleStepIntoAsync();
+    Protocol.Debugger.stepOver();
+    await waitPauseAndDumpLocation();
+    await Protocol.Debugger.resume();
+  },
+
+  async function testDebuggerStmtBeforeCallback1() {
+    Protocol.Runtime.evaluate({expression: 'debugger; setTimeout(() => 1, 0);debugger;'});
+    // should break here, not inside setTimeout callback.
+    Protocol.Runtime.evaluate({expression: 'setTimeout(\'debugger\', 0)'});
+    await Protocol.Debugger.oncePaused();
+    Protocol.Debugger.stepOver();
+    await waitPauseAndDumpLocation();
+    Protocol.Debugger.scheduleStepIntoAsync();
+    Protocol.Debugger.stepOver();
+    await waitPauseAndDumpLocation();
+    await Protocol.Debugger.resume();
+    await waitPauseAndDumpLocation();
+    await Protocol.Debugger.resume();
+  },
+
+  async function testDebuggerStmtBeforeCallback2() {
+    Protocol.Runtime.evaluate({expression: 'debugger; setTimeout(\'debugger//should-break-here\', 0); setTimeout(() => 1, 0);'});
+    await Protocol.Debugger.oncePaused();
+    Protocol.Debugger.stepOver();
+    await Protocol.Debugger.oncePaused();
+    Protocol.Debugger.stepOver();
+    await waitPauseAndDumpLocation();
+    Protocol.Debugger.scheduleStepIntoAsync();
+    Protocol.Debugger.stepOver();
+    await waitPauseAndDumpLocation();
+    await Protocol.Debugger.resume();
+    await InspectorTest.waitPendingTasks();
+  },
+
+  async function testSetTimeoutWithoutJS() {
+    Protocol.Runtime.evaluate({expression: 'debugger; setTimeout(\'}\', 0);setTimeout(\'var a = 239;\', 0);setTimeout(\'debugger\', 0);'});
+    await Protocol.Debugger.oncePaused();
+    Protocol.Debugger.stepOver();
+    await waitPauseAndDumpLocation();
+    Protocol.Debugger.scheduleStepIntoAsync();
+    Protocol.Debugger.stepOver();
+    await waitPauseAndDumpLocation();
+    await Protocol.Debugger.resume();
+  }
+]);
+
+async function waitPauseAndDumpLocation() {
+  var message = await Protocol.Debugger.oncePaused();
+  InspectorTest.log('paused at:');
+  await InspectorTest.logSourceLocation(message.params.callFrames[0].location);
+  return message;
+}