[inspector] use same schedulePauseOnNextStatement strategy for Debugger.pause

test/inspector/protocol-test.js

 // Copyright 2016 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 = {};
 InspectorTest._dispatchTable = new Map();
 InspectorTest._requestId = 0;
 InspectorTest._dumpInspectorProtocolMessages = false;
 InspectorTest._eventHandler = {};
 InspectorTest._commandsForLogging = new Set();
@@ skipping 134 matching lines @@
 
 InspectorTest.logSourceLocation = function(location)
 {
   var scriptId = location.scriptId;
   if (!InspectorTest._scriptMap || !InspectorTest._scriptMap.has(scriptId)) {
     InspectorTest.log("InspectorTest.setupScriptMap should be called before Protocol.Debugger.enable.");
     InspectorTest.completeTest();
   }
   var script = InspectorTest._scriptMap.get(scriptId);
   if (!script.scriptSource) {
-    return Protocol.Debugger.getScriptSource({ scriptId })
+    // TODO(kozyatinskiy): doesn't assume that contextId == contextGroupId.
+    return Protocol.Debugger.getScriptSource({ scriptId }, script.executionContextId)
       .then(message => script.scriptSource = message.result.scriptSource)
       .then(dumpSourceWithLocation);
   }
   return Promise.resolve().then(dumpSourceWithLocation);
 
   function dumpSourceWithLocation() {
     var lines = script.scriptSource.split('\n');
     var line = lines[location.lineNumber];
     line = line.slice(0, location.columnNumber) + '#' + (line.slice(location.columnNumber) || '');
     lines[location.lineNumber] = line;
@@ skipping 144 matching lines @@
     }
   } catch (e) {
     InspectorTest.log("Exception when dispatching message: " + e + "\n" + e.stack + "\n message = " + JSON.stringify(messageObject, null, 2));
     InspectorTest.completeTest();
   }
 }
 
 InspectorTest.loadScript = function(fileName) {
   InspectorTest.addScript(utils.read(fileName));
 }