VM: Link native calls lazily.

runtime/vm/ast.h

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef VM_AST_H_
 #define VM_AST_H_
 
 #include "platform/assert.h"
 #include "vm/allocation.h"
 #include "vm/growable_array.h"
@@ skipping 1787 matching lines @@
 
 
 // The body of a Dart function marked as 'native' consists of this node.
 class NativeBodyNode : public AstNode {
  public:
   NativeBodyNode(intptr_t token_pos,
                  const Function& function,
                  const String& native_c_function_name,
                  NativeFunction native_c_function,
                  LocalScope* scope,
-                 bool is_bootstrap_native)
+                 bool is_bootstrap_native,
+                 bool link_lazily = false)
       : AstNode(token_pos),
         function_(function),
         native_c_function_name_(native_c_function_name),
         native_c_function_(native_c_function),
         scope_(scope),
-        is_bootstrap_native_(is_bootstrap_native) {
+        is_bootstrap_native_(is_bootstrap_native),
+        link_lazily_(link_lazily) {
     ASSERT(function_.IsZoneHandle());
     ASSERT(native_c_function_ != NULL);
     ASSERT(native_c_function_name_.IsZoneHandle());
     ASSERT(native_c_function_name_.IsSymbol());
   }
 
   const Function& function() const { return function_; }
   const String& native_c_function_name() const {
     return native_c_function_name_;
   }
   NativeFunction native_c_function() const { return native_c_function_; }
   LocalScope* scope() const { return scope_; }
   bool is_bootstrap_native() const { return is_bootstrap_native_; }
 
+  bool link_lazily() const { return link_lazily_; }
+
   virtual void VisitChildren(AstNodeVisitor* visitor) const { }
 
   DECLARE_COMMON_NODE_FUNCTIONS(NativeBodyNode);
 
  private:
   const Function& function_;  // Native Dart function.
   const String& native_c_function_name_;
   NativeFunction native_c_function_;  // Actual non-Dart implementation.
   LocalScope* scope_;
   const bool is_bootstrap_native_;  // Is a bootstrap native method.
+  const bool link_lazily_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(NativeBodyNode);
 };
 
 
 class CatchClauseNode : public AstNode {
  public:
   static const intptr_t kInvalidTryIndex = -1;
 
   CatchClauseNode(intptr_t token_pos,
@@ skipping 162 matching lines @@
   const intptr_t try_index_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(InlinedFinallyNode);
 };
 
 }  // namespace dart
 
 #undef DECLARE_COMMON_NODE_FUNCTIONS
 
 #endif  // VM_AST_H_