[interpreter] move the dispatch table off heap.

src/interpreter/interpreter.h

Index: src/interpreter/interpreter.h
diff --git a/src/interpreter/interpreter.h b/src/interpreter/interpreter.h
index 6075df835f30d6d7f4332d07fcbe0cd8c5ba2d75..1a3143b02d8f5af69af1497e855932a63eb76885 100644
--- a/src/interpreter/interpreter.h
+++ b/src/interpreter/interpreter.h
@@ -32,17 +32,19 @@ class Interpreter {
   explicit Interpreter(Isolate* isolate);
   virtual ~Interpreter() {}
 
-  // Creates an uninitialized interpreter handler table, where each handler
-  // points to the Illegal builtin.
-  static Handle<FixedArray> CreateUninitializedInterpreterTable(
-      Isolate* isolate);
-
-  // Initializes the interpreter.
+  // Initializes the interpreter dispatch table.
   void Initialize();
 
   // Generate bytecode for |info|.
   static bool MakeBytecode(CompilationInfo* info);
 
+  // GC support.
+  void IterateDispatchTable(ObjectVisitor* v);
+
+  Address dispatch_table_address() {
+    return reinterpret_cast<Address>(&dispatch_table_[0]);
+  }
+
  private:
 // Bytecode handler generator functions.
 #define DECLARE_BYTECODE_HANDLER_GENERATOR(Name, ...) \
@@ -115,9 +117,12 @@ class Interpreter {
   void DoStoreLookupSlot(LanguageMode language_mode,
                          compiler::InterpreterAssembler* assembler);
 
-  bool IsInterpreterTableInitialized(Handle<FixedArray> handler_table);
+  bool IsDispatchTableInitialized();
+
+  static const int kDispatchTableSize = static_cast<int>(Bytecode::kLast) + 1;
 
   Isolate* isolate_;
+  Object* dispatch_table_[kDispatchTableSize];
 
   DISALLOW_COPY_AND_ASSIGN(Interpreter);
 };