Revert r12625 due to sandbox incompatibility.

src/heap.cc

Index: src/heap.cc
diff --git a/src/heap.cc b/src/heap.cc
index 97524a46e0c768b99b56667987387933ba745862..13360279d263de15619515231d809050f757af02 100644
--- a/src/heap.cc
+++ b/src/heap.cc
@@ -211,20 +211,6 @@ intptr_t Heap::CommittedMemory() {
       lo_space_->Size();
 }
 
-
-size_t Heap::CommittedPhysicalMemory() {
-  if (!HasBeenSetUp()) return 0;
-
-  return new_space_.CommittedPhysicalMemory() +
-      old_pointer_space_->CommittedPhysicalMemory() +
-      old_data_space_->CommittedPhysicalMemory() +
-      code_space_->CommittedPhysicalMemory() +
-      map_space_->CommittedPhysicalMemory() +
-      cell_space_->CommittedPhysicalMemory() +
-      lo_space_->CommittedPhysicalMemory();
-}
-
-
 intptr_t Heap::CommittedMemoryExecutable() {
   if (!HasBeenSetUp()) return 0;