Implement crankshaft support for nested object literals.

src/arm/lithium-codegen-arm.h

Index: src/arm/lithium-codegen-arm.h
diff --git a/src/arm/lithium-codegen-arm.h b/src/arm/lithium-codegen-arm.h
index ac757ea863eb5b0ecc1f9d424bf3eddf07ee8e58..68ae0d1a3675efd6cb0f9fc86bfac2bf3c18909b 100644
--- a/src/arm/lithium-codegen-arm.h
+++ b/src/arm/lithium-codegen-arm.h
@@ -300,6 +300,13 @@ class LCodeGen BASE_EMBEDDED {
                                        Handle<Map> type,
                                        Handle<String> name);
 
+  // Emits optimized code to deep-copy the contents of statically known
+  // object graphs (e.g. object literal boilerplate).
+  void EmitDeepCopy(Handle<JSObject> object,
+                    Register result,
+                    Register source,
+                    int* offset);
+
   struct JumpTableEntry {
     explicit inline JumpTableEntry(Address entry)
         : label(),