Remove unnecessary _profileTypesByIdMap map

LayoutTests/inspector/profiler/heap-snapshot-test.js

 var initialize_HeapSnapshotTest = function() {
 
 InspectorTest.createHeapSnapshotMockFactories = function() {
 
 InspectorTest.createJSHeapSnapshotMockObject = function()
 {
     return {
         _rootNodeIndex: 0,
         _nodeTypeOffset: 0,
         _nodeNameOffset: 1,
@@ skipping 679 matching lines @@
     callback = InspectorTest.safeWrap(callback);
     var view = WebInspector.panels.profiles.visibleView;
     view.changeView(title, callback);
 };
 
 InspectorTest.takeAndOpenSnapshot = function(generator, callback)
 {
     callback = InspectorTest.safeWrap(callback);
     var uid = InspectorTest._nextUid++;
     var snapshot = generator();
-    var profileType = WebInspector.panels.profiles.getProfileType(WebInspector.HeapSnapshotProfileType.TypeId);
+    var profileType =  WebInspector.ProfileTypeRegistry.instance.heapSnapshotProfileType;
     var profile = new WebInspector.HeapProfileHeader(profileType, "Mock snapshot #" + uid, uid);
     function pushGeneratedSnapshot(uid, callback)
     {
         snapshot.snapshot.typeId = "HEAP";
         snapshot.snapshot.title = profile.title;
         snapshot.snapshot.uid = profile.uid;
         profileType.addHeapSnapshotChunk(uid, JSON.stringify(snapshot));
         setTimeout(callback, 0);
     }
     InspectorTest.override(HeapProfilerAgent, "getHeapSnapshot", pushGeneratedSnapshot);
     InspectorTest._takeAndOpenSnapshotCallback = callback;
     profileType.addProfile(profile);
-    WebInspector.panels.profiles._showProfile(profile);
+    WebInspector.panels.profiles.showProfile(profile);
 };
 
 InspectorTest.viewColumns = function()
 {
     return InspectorTest._currentGrid()._columnsArray;
 };
 
 InspectorTest.currentProfileView = function()
 {
     return WebInspector.panels.profiles.visibleView;
@@ skipping 13 matching lines @@
         function sortingComplete()
         {
             dataGrid.removeEventListener("sorting complete", sortingComplete, null);
             callback();
         }
         dataGrid.addEventListener("sorting complete", sortingComplete, null);
     }
 };
 
 };