[inspector] Refactor protocol-test.js

test/inspector/debugger/restore-breakpoint.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 that debugger agent uses source content to restore breakpoints.');
+let {session, contextGroup, Protocol} = InspectorTest.start('Checks that debugger agent uses source content to restore breakpoints.');
 
 Protocol.Debugger.enable();
 InspectorTest.runTestSuite([
   function testSameSource(next) {
     var source = 'function foo() {\nboo();\n}';
     test(source, source, { lineNumber: 1, columnNumber: 0 }, next);
   },
 
   function testOneLineOffset(next) {
     var source = 'function foo() {\nboo();\n}';
@@ skipping 44 matching lines @@
   var sourceURL = `test${++finishedTests}.js`;
   await Protocol.Debugger.setBreakpointByUrl({
     url: sourceURL,
     lineNumber: location.lineNumber,
     columnNumber: location.columnNumber
   });
   await Protocol.Runtime.evaluate({ expression: `${source}\n//# sourceURL=${sourceURL}` });
   await Protocol.Runtime.evaluate({ expression: `${newSource}\n//# sourceURL=${sourceURL}` });
   next();
 }