- Remove heap tracing.

runtime/vm/heap.cc

Index: runtime/vm/heap.cc
===================================================================
--- runtime/vm/heap.cc	(revision 21785)
+++ runtime/vm/heap.cc	(working copy)
@@ -8,7 +8,6 @@
 #include "platform/utils.h"
 #include "vm/flags.h"
 #include "vm/heap_profiler.h"
-#include "vm/heap_trace.h"
 #include "vm/isolate.h"
 #include "vm/object.h"
 #include "vm/object_set.h"
@@ -41,7 +40,6 @@
                              kNewObjectAlignmentOffset);
   old_space_ = new PageSpace(this, (FLAG_old_gen_heap_size * MB));
   stats_.num_ = 0;
-  heap_trace_ = new HeapTrace;
 }
 
 
@@ -61,9 +59,6 @@
       return AllocateOld(size, HeapPage::kData);
     }
   }
-  if (HeapTrace::is_enabled()) {
-    heap_trace_->TraceAllocation(addr, size);
-  }
   return addr;
 }
 
@@ -80,9 +75,6 @@
       return 0;
     }
   }
-  if (HeapTrace::is_enabled()) {
-    heap_trace_->TraceAllocation(addr, size);
-  }
   return addr;
 }