Make allocation profile configurable (tags, function v. code)

runtime/observatory/lib/src/elements/cpu_profile.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library cpu_profile_element;
 
 import 'dart:async';
 import 'dart:html';
 import 'observatory_element.dart';
 import 'package:observatory/service.dart';
@@ skipping 430 matching lines @@
   Future<CpuProfile> reload(Isolate isolate) async {
     profile.clear();
     if (isolate == null) {
       _update(profile);
       // Notify listener.
       onSampleBufferUpdate(profile);
       return profile;
     }
     await _changeState(kFetchingState);
     try {
-      var params = { 'tags': tagSelector };
-      var response = await isolate.invokeRpc('_getCpuProfile', params);
+      var response;
+      if (allocationProfileClass != null) {
+        response =
+            await allocationProfileClass.getAllocationSamples(tagSelector);
+      } else {
+        var params = { 'tags': tagSelector };
+        response = await isolate.invokeRpc('_getCpuProfile', params);
+      }
       await _changeState(kLoadingState);
       profile.load(isolate, response);
       _update(profile);
       await _changeState(kLoadedState);
       // Notify listener.
       onSampleBufferUpdate(profile);
       return profile;
     } catch (e, st) {
       if (e is ServerRpcException) {
         ServerRpcException se = e;
@@ skipping 42 matching lines @@
   @observable bool showTagSelector = true;
 
   @observable String sampleCount = '';
   @observable String refreshTime = '';
   @observable String sampleRate = '';
   @observable String stackDepth = '';
   @observable String timeSpan = '';
   @observable String fetchTime = '';
   @observable String loadTime = '';
   @observable String tagSelector = 'UserVM';
-  @observable String state = 'kFetching';
+  @observable String state = kFetchingState;
   @observable var exception;
   @observable var stackTrace;
 
   static const kDisabledState = 'kDisabled';
   static const kExceptionState = 'Exception';
   static const kFetchingState = 'kFetching';
   static const kLoadedState = 'kLoaded';
   static const kLoadingState = 'kLoading';
+  static const kNotLoadedState = 'kNotLoaded';
 
   Isolate isolate;
+  Class allocationProfileClass;
 
   final CpuProfile profile = new CpuProfile();
   final Stopwatch _stopWatch = new Stopwatch();
 }
 
 @CustomTag('stack-trace-tree-config')
 class StackTraceTreeConfigElement extends ObservatoryElement {
   StackTraceTreeConfigElement.created() : super.created();
 
   void modeSelectorChanged(oldValue) {
@@ skipping 633 matching lines @@
       return;
     }
     var tree = profile.loadCodeTree(exclusive ? 'exclusive' : 'inclusive');
     if (tree == null) {
       return;
     }
     var rootRow = new CodeProfileTreeRow(codeTree, null, profile, tree.root);
     codeTree.initialize(rootRow);
   }
 }