[Isolates] Merge crankshaft (r5922 from bleeding_edge).

src/zone.h

Index: src/zone.h
diff --git a/src/zone.h b/src/zone.h
index 9b38a6f5b92c0c3108dae0e054e355509e2e88f1..922cf8429e0ab50781a6ea587d9c3a75b4bbc477 100644
--- a/src/zone.h
+++ b/src/zone.h
@@ -177,19 +177,17 @@ class ZoneList: public List<T, ZoneListAllocationPolicy> {
   // always zero. The capacity must be non-negative.
   explicit ZoneList(int capacity)
       : List<T, ZoneListAllocationPolicy>(capacity) { }
+
+  // Construct a new ZoneList by copying the elements of the given ZoneList.
+  explicit ZoneList(const ZoneList<T>& other)
+      : List<T, ZoneListAllocationPolicy>(other.length()) {
+    AddAll(other);
+  }
 };
 
 
-// A zone splay tree.  The config type parameter encapsulates the
-// different configurations of a concrete splay tree (see splay-tree.h).
-// The tree itself and all its elements are allocated in the Zone.
-template <typename Config>
-class ZoneSplayTree: public SplayTree<Config, ZoneListAllocationPolicy> {
- public:
-  ZoneSplayTree()
-      : SplayTree<Config, ZoneListAllocationPolicy>() {}
-  ~ZoneSplayTree();
-};
+// Introduce a convenience type for zone lists of map handles.
+typedef ZoneList<Handle<Map> > ZoneMapList;
 
 
 // ZoneScopes keep track of the current parsing and compilation
@@ -197,6 +195,7 @@ class ZoneSplayTree: public SplayTree<Config, ZoneListAllocationPolicy> {
 // outer-most scope.
 class ZoneScope BASE_EMBEDDED {
  public:
+  // TODO(isolates): pass isolate pointer here.
   inline explicit ZoneScope(ZoneScopeMode mode);
 
   virtual ~ZoneScope();
@@ -217,6 +216,18 @@ class ZoneScope BASE_EMBEDDED {
 };
 
 
+// A zone splay tree.  The config type parameter encapsulates the
+// different configurations of a concrete splay tree (see splay-tree.h).
+// The tree itself and all its elements are allocated in the Zone.
+template <typename Config>
+class ZoneSplayTree: public SplayTree<Config, ZoneListAllocationPolicy> {
+ public:
+  ZoneSplayTree()
+      : SplayTree<Config, ZoneListAllocationPolicy>() {}
+  ~ZoneSplayTree();
+};
+
+
 } }  // namespace v8::internal
 
 #endif  // V8_ZONE_H_