[inspector] Make InspectorTest.sendCommand* private

test/inspector/debugger/set-script-source.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.evaluateInPage(
+InspectorTest.addScript(
 `function TestExpression(a, b) {
     return a + b;
 }`);
 
 // A general-purpose engine for sending a sequence of protocol commands.
 // The clients provide requests and response handlers, while the engine catches
 // errors and makes sure that once there's nothing to do completeTest() is called.
 // @param step is an object with command, params and callback fields
 function runRequestSeries(step) {
   processStep(step);
@@ skipping 39 matching lines @@
         try {
           next = currentStep.callback(response.result);
         } catch (e) {
           InspectorTest.log(e.stack);
           InspectorTest.completeTest();
           return;
         }
       }
       processStep(next);
     }
-    InspectorTest.sendCommand(currentStep.command, currentStep.params, innerCallback);
+    var command = currentStep.command.split(".");
+    Protocol[command[0]][command[1]](currentStep.params).then(innerCallback);
   }
 }
 
 function logEqualsCheck(actual, expected)
 {
   if (actual === expected) {
     InspectorTest.log("PASS, result value: " + actual);
   } else {
     InspectorTest.log("FAIL, actual value: " + actual + ", expected: " + expected);
   }
@@ skipping 66 matching lines @@
 
   function errorCallbackSetScriptSource2(result) {
     var exceptionDetails = result.exceptionDetails;
     logCheck("Has error reported", !!exceptionDetails);
     logCheck("Reported error is a compile error", !!exceptionDetails);
     if (exceptionDetails)
       logEqualsCheck(exceptionDetails.lineNumber, 1);
     return next;
   }
 }