Add a flag to the ARM version of new space allocation in generated code...

src/x64/macro-assembler-x64.h

Index: src/x64/macro-assembler-x64.h
===================================================================
--- src/x64/macro-assembler-x64.h	(revision 4616)
+++ src/x64/macro-assembler-x64.h	(working copy)
@@ -33,6 +33,17 @@
 namespace v8 {
 namespace internal {
 
+// Flags used for the AllocateInNewSpace functions.
+enum AllocationFlags {
+  // No special flags.
+  NO_ALLOCATION_FLAGS = 0,
+  // Return the pointer to the allocated already tagged as a heap object.
+  TAG_OBJECT = 1 << 0,
+  // The content of the result register already contains the allocation top in
+  // new space.
+  RESULT_CONTAINS_TOP = 1 << 1
+};
+
 // Default scratch register used by MacroAssembler (and other code that needs
 // a spare register). The register isn't callee save, and not used by the
 // function calling convention.