Added ProfileView object for performing sorting, searching and filtering operations on a profile.

test/mjsunit/tools/profile.js

Index: test/mjsunit/tools/profile.js
diff --git a/test/mjsunit/tools/profile.js b/test/mjsunit/tools/profile.js
index 87ec8fafd51c2724b941e62705338576e375d60c..4a938600be5b8f1a304842998accacfd73830fb8 100644
--- a/test/mjsunit/tools/profile.js
+++ b/test/mjsunit/tools/profile.js
@@ -270,7 +270,8 @@ function assertNodeWeights(root, path, selfTicks, totalTicks) {
     counted++;
   }
 
-  var flatProfile = testDriver.profile.getFlatProfile();
+  var flatProfile =
+      testDriver.profile.getFlatProfile().getRoot().exportChildren();
   assertEquals(counted, flatProfile.length, 'counted vs. flatProfile');
   for (var i = 0; i < flatProfile.length; ++i) {
     var rec = flatProfile[i];