Make LCodeGen::RegisterDependentCodeForEmbeddedMaps platform independent.

src/x64/lithium-codegen-x64.cc

Index: src/x64/lithium-codegen-x64.cc
diff --git a/src/x64/lithium-codegen-x64.cc b/src/x64/lithium-codegen-x64.cc
index 9d0dc9423e6cfb5253b9d5870d7cac135d0f07a4..3ab523660fda7b98c84a1cb1626ceb03ad705640 100644
--- a/src/x64/lithium-codegen-x64.cc
+++ b/src/x64/lithium-codegen-x64.cc
@@ -777,36 +777,6 @@ void LCodeGen::DeoptimizeIf(Condition cc,
 }
 
 
-void LCodeGen::RegisterDependentCodeForEmbeddedMaps(Handle<Code> code) {
-  ZoneList<Handle<Map> > maps(1, zone());
-  ZoneList<Handle<JSObject> > objects(1, zone());
-  int mode_mask = RelocInfo::ModeMask(RelocInfo::EMBEDDED_OBJECT);
-  for (RelocIterator it(*code, mode_mask); !it.done(); it.next()) {
-    if (Code::IsWeakEmbeddedObject(code->kind(), it.rinfo()->target_object())) {
-      if (it.rinfo()->target_object()->IsMap()) {
-        Handle<Map> map(Map::cast(it.rinfo()->target_object()));
-        maps.Add(map, zone());
-      } else if (it.rinfo()->target_object()->IsJSObject()) {
-        Handle<JSObject> object(JSObject::cast(it.rinfo()->target_object()));
-        objects.Add(object, zone());
-      }
-    }
-  }
-#ifdef VERIFY_HEAP
-  // This disables verification of weak embedded objects after full GC.
-  // AddDependentCode can cause a GC, which would observe the state where
-  // this code is not yet in the depended code lists of the embedded maps.
-  NoWeakObjectVerificationScope disable_verification_of_embedded_objects;
-#endif
-  for (int i = 0; i < maps.length(); i++) {
-    maps.at(i)->AddDependentCode(DependentCode::kWeaklyEmbeddedGroup, code);
-  }
-  for (int i = 0; i < objects.length(); i++) {
-    AddWeakObjectToCodeDependency(isolate()->heap(), objects.at(i), code);
-  }
-}
-
-
 void LCodeGen::PopulateDeoptimizationData(Handle<Code> code) {
   int length = deoptimizations_.length();
   if (length == 0) return;