Revert "Updated MallocHooks to collect stack traces when memory is allocated."

runtime/vm/dart.cc

Index: runtime/vm/dart.cc
diff --git a/runtime/vm/dart.cc b/runtime/vm/dart.cc
index 83b1055b308621580006287e09e58a33d60212dd..07cdcdc1fd4d5662ec39a65224617601e2f64bcf 100644
--- a/runtime/vm/dart.cc
+++ b/runtime/vm/dart.cc
@@ -152,6 +152,7 @@ char* Dart::InitOnce(const uint8_t* vm_isolate_snapshot,
   start_time_micros_ = OS::GetCurrentMonotonicMicros();
   VirtualMemory::InitOnce();
   OSThread::InitOnce();
+  MallocHooks::InitOnce();
   if (FLAG_support_timeline) {
     Timeline::InitOnce();
   }
@@ -232,13 +233,6 @@ char* Dart::InitOnce(const uint8_t* vm_isolate_snapshot,
         return strdup("Precompiled runtime requires a precompiled snapshot");
 #else
         StubCode::InitOnce();
-        // MallocHooks can't be initialized until StubCode has been since stack
-        // trace generation relies on stub methods that are generated in
-        // StubCode::InitOnce().
-        // TODO(bkonyi) Split initialization for stack trace collection from the
-        // initialization for the actual malloc hooks to increase accuracy of
-        // memory consumption statistics.
-        MallocHooks::InitOnce();
 #endif
       } else {
         return strdup("Invalid vm isolate snapshot seen");
@@ -277,13 +271,6 @@ char* Dart::InitOnce(const uint8_t* vm_isolate_snapshot,
 #else
       vm_snapshot_kind_ = Snapshot::kNone;
       StubCode::InitOnce();
-      // MallocHooks can't be initialized until StubCode has been since stack
-      // trace generation relies on stub methods that are generated in
-      // StubCode::InitOnce().
-      // TODO(bkonyi) Split initialization for stack trace collection from the
-      // initialization for the actual malloc hooks to increase accuracy of
-      // memory consumption statistics.
-      MallocHooks::InitOnce();
       Symbols::InitOnce(vm_isolate_);
 #endif
     }