Expose allocation tracing over service protocol

runtime/vm/profiler_service.h

 // Copyright (c) 2015, 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.
 
 #ifndef VM_PROFILER_SERVICE_H_
 #define VM_PROFILER_SERVICE_H_
 
 #include "vm/allocation.h"
 #include "vm/code_observers.h"
 #include "vm/globals.h"
@@ skipping 348 matching lines @@
   ProfileTrieNode* current_;
   bool code_trie_;
 };
 
 
 class ProfilerService : public AllStatic {
  public:
   static void PrintJSON(JSONStream* stream,
                         Profile::TagOrder tag_order);
 
+  static void PrintAllocationJSON(JSONStream* stream,
+                                  Profile::TagOrder tag_order,
+                                  const Class& cls);
+
   static void ClearSamples();
+
+ private:
+  static void PrintJSONImpl(Isolate* isolate,
+                            JSONStream* stream,
+                            Profile::TagOrder tag_order,
+                            SampleFilter* filter);
 };
 
 }  // namespace dart
 
 #endif  // VM_PROFILER_SERVICE_H_