Refactoring using TempAssign.

src/serialize.cc

Index: src/serialize.cc
===================================================================
--- src/serialize.cc	(revision 977)
+++ src/serialize.cc	(working copy)
@@ -933,19 +933,17 @@
 // Serialize objects by writing them into the stream.
 
 void Serializer::VisitPointers(Object** start, Object** end) {
-  bool root = root_;
-  root_ = false;
+  TempAssign<bool> temp_root(&root_, false);
   for (Object** p = start; p < end; ++p) {
     bool serialized;
     Address a = Encode(*p, &serialized);
-    if (root) {
+    if (temp_root.old_value()) {
       roots_++;
       // If the object was not just serialized,
       // write its encoded address instead.
       if (!serialized) PutEncodedAddress(a);
     }
   }
-  root_ = root;
 }
 
 
@@ -1236,10 +1234,9 @@
 
 
 void Deserializer::VisitPointers(Object** start, Object** end) {
-  bool root = root_;
-  root_ = false;
+  TempAssign<bool> temp_root(&root_, false);
   for (Object** p = start; p < end; ++p) {
-    if (root) {
+    if (temp_root.old_value()) {
       roots_++;
       // Read the next object or pointer from the stream
       // pointer in the stream.
@@ -1256,7 +1253,6 @@
       *p = Resolve(reinterpret_cast<Address>(*p));
     }
   }
-  root_ = root;
 }