[inspector] implemented blackboxing inside v8

test/inspector/debugger/stepping-with-blackboxed-ranges.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.addScript(
 `function blackboxedBoo()
 {
     var a = 42;
     var b = foo();
     return a + b;
@@ skipping 74 matching lines @@
     scriptId: scriptId,
     positions: positions
   }).then(setIncorrectRanges.bind(null, scriptId));
 }
 
 function setMixedSourceRanges(scriptId)
 {
   Protocol.Debugger.onPaused(runAction);
   Protocol.Debugger.setBlackboxedRanges({
     scriptId: scriptId,
-    positions: [ { lineNumber: 8, columnNumber: 0 }, { lineNumber: 15, columnNumber: 0 } ] // blackbox ranges for mixed.js
+    positions: [ { lineNumber: 6, columnNumber: 0 }, { lineNumber: 14, columnNumber: 0 } ] // blackbox ranges for mixed.js
   }).then(runAction);
 }
 
 var actions = [ "stepOut", "print", "stepOut", "print", "stepOut", "print",
     "stepInto", "print", "stepOver", "stepInto", "print", "stepOver", "stepInto", "print",
     "stepOver", "stepInto", "print" ];
 
 function runAction(response)
 {
   var action = actions.shift();
@@ skipping 13 matching lines @@
 
 function printCallFrames(callFrames)
 {
   var topCallFrame = callFrames[0];
   if (topCallFrame.functionName.startsWith("blackboxed"))
     InspectorTest.log("FAIL: blackboxed function in top call frame");
   for (var callFrame of callFrames)
     InspectorTest.log(callFrame.functionName + ": " + callFrame.location.lineNumber + ":" + callFrame.location.columnNumber);
   InspectorTest.log("");
 }