Remove support for pretenuring as it is not fully implemented and is currently turned on for a very…

runtime/vm/assembler_arm.cc

Index: runtime/vm/assembler_arm.cc
diff --git a/runtime/vm/assembler_arm.cc b/runtime/vm/assembler_arm.cc
index bf5edce6fb99b2964776362ec1c82459a3a02cd9..7bcba9eb972c258350042663a2d12318ba374dcc 100644
--- a/runtime/vm/assembler_arm.cc
+++ b/runtime/vm/assembler_arm.cc
@@ -3478,7 +3478,7 @@ void Assembler::TryAllocate(const Class& cls,
     // (i.e. the allocation stub) which will allocate the object and trace the
     // allocation call site.
     MaybeTraceAllocation(cls.id(), temp_reg, failure);
-    Heap::Space space = Heap::SpaceForAllocation(cls.id());
+    Heap::Space space = Heap::kNew;
     ldr(temp_reg, Address(THR, Thread::heap_offset()));
     ldr(instance_reg, Address(temp_reg, Heap::TopOffset(space)));
     // TODO(koda): Protect against unsigned overflow here.
@@ -3525,7 +3525,7 @@ void Assembler::TryAllocateArray(intptr_t cid,
     // (i.e. the allocation stub) which will allocate the object and trace the
     // allocation call site.
     MaybeTraceAllocation(cid, temp1, failure);
-    Heap::Space space = Heap::SpaceForAllocation(cid);
+    Heap::Space space = Heap::kNew;
     ldr(temp1, Address(THR, Thread::heap_offset()));
     // Potential new object start.
     ldr(instance, Address(temp1, Heap::TopOffset(space)));