Minor cleanup of activation frame creation code. Get the code object while iterating the frames as …

vm/debugger.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_DEBUGGER_H_
 #define VM_DEBUGGER_H_
 
 #include "include/dart_debugger_api.h"
 
 #include "vm/object.h"
@@ skipping 101 matching lines @@
 
   friend class Debugger;
   DISALLOW_COPY_AND_ASSIGN(CodeBreakpoint);
 };
 
 
 // ActivationFrame represents one dart function activation frame
 // on the call stack.
 class ActivationFrame : public ZoneAllocated {
  public:
-  explicit ActivationFrame(uword pc, uword fp, uword sp, const Context& ctx);
+  ActivationFrame(uword pc, uword fp, uword sp,
+                  const Code& code, const Context& ctx);
 
   uword pc() const { return pc_; }
   uword fp() const { return fp_; }
   uword sp() const { return sp_; }
 
   const Function& DartFunction();
   const Code& DartCode();
   RawString* QualifiedFunctionName();
   RawString* SourceUrl();
   RawScript* SourceScript();
@@ skipping 27 matching lines @@
   void GetDescIndices();
   RawInstance* GetLocalVarValue(intptr_t slot_index);
   RawInstance* GetInstanceCallReceiver(intptr_t num_actual_args);
 
   uword pc_;
   uword fp_;
   uword sp_;
 
   // The anchor of the context chain for this function.
   const Context& ctx_;
-
-  Function& function_;
-  Code& code_;
+  const Code& code_;
+  const Function& function_;
   intptr_t token_pos_;
   intptr_t pc_desc_index_;
   intptr_t line_number_;
   intptr_t context_level_;
 
   bool vars_initialized_;
   LocalVarDescriptors& var_descriptors_;
   ZoneGrowableArray<intptr_t> desc_indices_;
   PcDescriptors& pc_desc_;
 
@@ skipping 193 matching lines @@
   static EventHandler* event_handler_;
 
   friend class SourceBreakpoint;
   DISALLOW_COPY_AND_ASSIGN(Debugger);
 };
 
 
 }  // namespace dart
 
 #endif  // VM_DEBUGGER_H_