Revert "Added isolate + thread high watermark tracking to Observatory"

runtime/vm/thread.cc

 // 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.
 
 #include "vm/thread.h"
 
 #include "vm/compiler_stats.h"
 #include "vm/dart_api_state.h"
 #include "vm/growable_array.h"
 #include "vm/isolate.h"
@@ skipping 56 matching lines @@
       isolate_(NULL),
       heap_(NULL),
       top_exit_frame_info_(0),
       store_buffer_block_(NULL),
       vm_tag_(0),
       task_kind_(kUnknownTask),
       dart_stream_(NULL),
       os_thread_(NULL),
       thread_lock_(new Monitor()),
       zone_(NULL),
-      current_thread_memory_(0),
-      thread_memory_high_watermark_(0),
       api_reusable_scope_(NULL),
       api_top_scope_(NULL),
       top_resource_(NULL),
       long_jump_base_(NULL),
       no_callback_scope_depth_(0),
 #if defined(DEBUG)
       top_handle_scope_(NULL),
       no_handle_scope_depth_(0),
       no_safepoint_scope_depth_(0),
 #endif
@@ skipping 119 matching lines @@
 
 
 #ifndef PRODUCT
 // Collect information about each individual zone associated with this thread.
 void Thread::PrintJSON(JSONStream* stream) const {
   JSONObject jsobj(stream);
   jsobj.AddProperty("type", "_Thread");
   jsobj.AddPropertyF("id", "threads/%" Pd "",
                      OSThread::ThreadIdToIntPtr(os_thread()->trace_id()));
   jsobj.AddProperty("kind", TaskKindToCString(task_kind()));
-  jsobj.AddProperty("threadMemoryHighWatermark", thread_memory_high_watermark_);
   Zone* zone = zone_;
   {
     JSONArray zone_info_array(&jsobj, "zones");
     zone = zone_;
     while (zone != NULL) {
       zone_info_array.AddValue(zone);
       zone = zone->previous();
     }
   }
 }
@@ skipping 589 matching lines @@
 
 DisableThreadInterruptsScope::~DisableThreadInterruptsScope() {
   if (thread() != NULL) {
     OSThread* os_thread = thread()->os_thread();
     ASSERT(os_thread != NULL);
     os_thread->EnableThreadInterrupts();
   }
 }
 
 }  // namespace dart