[inspector] added createContextGroup for tests

test/inspector/runtime/create-context.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 createContext().');
+
+InspectorTest.setupScriptMap();
+Protocol.Runtime.onExecutionContextCreated(InspectorTest.logMessage);
+Protocol.Debugger.onPaused((message) => {
+  InspectorTest.logSourceLocation(message.params.callFrames[0].location);
+  Protocol.Debugger.stepOut();
+});
+var executionContextIds = new Set();
+Protocol.Debugger.onScriptParsed(message => executionContextIds.add(message.params.executionContextId));
+var contextGroupId;
+Protocol.Runtime.enable()
+  .then(() => contextGroupId = utils.createContextGroup())
+  .then(() => Protocol.Runtime.enable({}, contextGroupId))
+  .then(() => Protocol.Debugger.enable())
+  .then(() => Protocol.Debugger.enable({}, contextGroupId))
+  .then(InspectorTest.logMessage)
+  .then(() => {
+    Protocol.Runtime.evaluate({ expression: 'debugger;' })
+    Protocol.Runtime.evaluate({ expression: 'setTimeout(x => x * 2, 0)' }, contextGroupId);
+    Protocol.Runtime.evaluate({ expression: 'setTimeout(x => x * 3, 0)' });
+  })
+  .then(() => InspectorTest.waitPendingTasks())
+  .then(() => {
+    InspectorTest.log(`Reported script's execution id: ${executionContextIds.size}`);
+    executionContextIds.clear();
+  })
+  .then(() => utils.reconnect())
+  .then(() => {
+    Protocol.Runtime.evaluate({ expression: 'debugger;' })
+    Protocol.Runtime.evaluate({ expression: 'setTimeout(x => x * 2, 0)' }, contextGroupId);
+    Protocol.Runtime.evaluate({ expression: 'setTimeout(x => x * 3, 0)' });
+  })
+  .then(() => InspectorTest.waitPendingTasks())
+  .then(() => Protocol.Debugger.disable({}, contextGroupId))
+  .then(() => Protocol.Debugger.disable({}))
+  .then(() => InspectorTest.log(`Reported script's execution id: ${executionContextIds.size}`))
+  .then(InspectorTest.completeTest);