[inspector] better isArrayLike for injected-script-source.js

test/inspector/protocol-test.js

Index: test/inspector/protocol-test.js
diff --git a/test/inspector/protocol-test.js b/test/inspector/protocol-test.js
index c375a7e7a2a6283d1cf7d466ba9b2245510e4807..777cd02d20ad345956700d6ba19a3fb3b55dba7a 100644
--- a/test/inspector/protocol-test.js
+++ b/test/inspector/protocol-test.js
@@ -344,6 +344,7 @@ InspectorTest.setupInjectedScriptEnvironment = function(debug) {
   if (debug) {
     InspectorTest.log('WARNING: InspectorTest.setupInjectedScriptEnvironment with debug flag for debugging only and should not be landed.');
     InspectorTest.log('WARNING: run test with --expose-inspector-scripts flag to get more details.');
+    InspectorTest.log('WARNING: you can additionally comment rjsmin in xxd.py to get unminified injected-script-source.js.');
     InspectorTest.setupScriptMap();
     Protocol.Debugger.enable();
     Protocol.Debugger.onPaused(message => {