[inspector] Refactor protocol-test.js

test/inspector/debugger/framework-precise-ranges.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 framework debugging with blackboxed ranges.');
+let {session, contextGroup, Protocol} = InspectorTest.start('Checks framework debugging with blackboxed ranges.');
 
-InspectorTest.addScript(
+contextGroup.addScript(
     `
 function foo() {
   return boo();
 }
 function boo() {
   return 42;
 }
 function testFunction() {
   foo();
 }
 //# sourceURL=test.js`,
     7, 26);
 
-InspectorTest.setupScriptMap();
+session.setupScriptMap();
 Protocol.Debugger.onPaused(message => {
-  InspectorTest.logCallFrames(message.params.callFrames);
+  session.logCallFrames(message.params.callFrames);
   InspectorTest.log('');
   Protocol.Debugger.stepInto();
 });
 var scriptId;
 Protocol.Debugger.onScriptParsed(message => {
   if (message.params.url === 'test.js') {
     scriptId = message.params.scriptId;
   }
 });
 
@@ skipping 23 matching lines @@
   },
   function testBooPartiallyBlackboxed3(next) {
     // first line is blackboxed, second and third - not.
     testPositions([
       position(11, 0), position(12, 0), position(14, 0)
     ]).then(next);
   }
 ];
 
 function testPositions(positions) {
-  InspectorTest.contextGroup.schedulePauseOnNextStatement('', '');
+  contextGroup.schedulePauseOnNextStatement('', '');
   return Protocol.Debugger
       .setBlackboxedRanges({scriptId: scriptId, positions: positions})
       .then(InspectorTest.logMessage)
       .then(
           () => Protocol.Runtime.evaluate(
               {expression: 'testFunction()//# sourceURL=expr.js'}));
 }
 
 function position(line, column) {
   return {lineNumber: line, columnNumber: column};
 }