Merge art-cache dex files into oat files

Change-Id: I5a327a4e0b678bd9dabb12de4e21ef05e3fefd0b
diff --git a/src/mark_stack.cc b/src/mark_stack.cc
index a35fa2d..53a342b 100644
--- a/src/mark_stack.cc
+++ b/src/mark_stack.cc
@@ -18,7 +18,7 @@
 
 void MarkStack::Init() {
   size_t length = 64 * MB;
-  mem_map_.reset(MemMap::Map("dalvik-mark-stack", NULL, length, PROT_READ | PROT_WRITE));
+  mem_map_.reset(MemMap::MapAnonymous("dalvik-mark-stack", NULL, length, PROT_READ | PROT_WRITE));
   CHECK(mem_map_.get() != NULL) << "MemMap::Map() failed; aborting";
   byte* addr = mem_map_->GetAddress();
   base_ = reinterpret_cast<const Object**>(addr);