Move AccessorTable from full-codegen.h to ast.h.

src/ast.h

Index: src/ast.h
diff --git a/src/ast.h b/src/ast.h
index ffae46225b525afc9718222bf4fbc82d0490bd02..13d0b8a233861fdf656717481d53dbc398c41bf8 100644
--- a/src/ast.h
+++ b/src/ast.h
@@ -1514,6 +1514,27 @@ class ObjectLiteral final : public MaterializedLiteral {
 };
 
 
+// A map from property names to getter/setter pairs allocated in the zone.
+class AccessorTable : public TemplateHashMap<Literal, ObjectLiteral::Accessors,
+                                             ZoneAllocationPolicy> {
+ public:
+  explicit AccessorTable(Zone* zone)
+      : TemplateHashMap<Literal, ObjectLiteral::Accessors,
+                        ZoneAllocationPolicy>(Literal::Match,
+                                              ZoneAllocationPolicy(zone)),
+        zone_(zone) {}
+
+  Iterator lookup(Literal* literal) {
+    Iterator it = find(literal, true, ZoneAllocationPolicy(zone_));
+    if (it->second == NULL) it->second = new (zone_) ObjectLiteral::Accessors();
+    return it;
+  }
+
+ private:
+  Zone* zone_;
+};
+
+
 // Node for capturing a regexp literal.
 class RegExpLiteral final : public MaterializedLiteral {
  public: