- Remove heap tracing.

runtime/vm/heap.h

 // Copyright (c) 2012, 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_HEAP_H_
 #define VM_HEAP_H_
 
 #include "platform/assert.h"
 #include "vm/allocation.h"
 #include "vm/flags.h"
 #include "vm/globals.h"
 #include "vm/pages.h"
 #include "vm/scavenger.h"
 
 namespace dart {
 
 // Forward declarations.
-class HeapTrace;
 class Isolate;
 class ObjectPointerVisitor;
 class ObjectSet;
 class VirtualMemory;
 
 DECLARE_FLAG(bool, verbose_gc);
 DECLARE_FLAG(bool, verify_before_gc);
 DECLARE_FLAG(bool, verify_after_gc);
 DECLARE_FLAG(bool, gc_at_alloc);
 
@@ skipping 115 matching lines @@
   uword TopAddress();
   uword EndAddress();
   static intptr_t new_space_offset() { return OFFSET_OF(Heap, new_space_); }
 
   // Initialize the heap and register it with the isolate.
   static void Init(Isolate* isolate);
 
   // Verify that all pointers in the heap point to the heap.
   bool Verify() const;
 
-  // Accessor function to get the HeapTrace used for tracing.  There
-  // should only ever be one of these per isolate
-  HeapTrace* trace() const { return heap_trace_; }
-
   // Print heap sizes.
   void PrintSizes() const;
 
   // Return amount of memory used and capacity in a space.
   intptr_t Used(Space space) const;
   intptr_t Capacity(Space space) const;
 
   // Returns the [lowest, highest) addresses in the heap.
   void StartEndAddress(uword* start, uword* end) const;
 
@@ skipping 71 matching lines @@
   void RecordAfterGC();
   void PrintStats();
 
   // The different spaces used for allocation.
   Scavenger* new_space_;
   PageSpace* old_space_;
 
   // GC stats collection.
   GCStats stats_;
 
-  // The active heap trace.
-  HeapTrace* heap_trace_;
-
   // This heap is in read-only mode: No allocation is allowed.
   bool read_only_;
 
   // GC on the heap is in progress.
   bool gc_in_progress_;
 
   friend class GCTestHelper;
   DISALLOW_COPY_AND_ASSIGN(Heap);
 };
 
@@ skipping 21 matching lines @@
   NoHeapGrowthControlScope();
   ~NoHeapGrowthControlScope();
  private:
   bool current_growth_controller_state_;
   DISALLOW_COPY_AND_ASSIGN(NoHeapGrowthControlScope);
 };
 
 }  // namespace dart
 
 #endif  // VM_HEAP_H_