Resubmit change 6302 after fixing the compiler warning on older GCC compiler versions:

vm/stack_frame_test.cc

 // 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.
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "vm/class_finalizer.h"
 #include "vm/compiler.h"
 #include "vm/dart_api_impl.h"
 #include "vm/dart_entry.h"
@@ skipping 78 matching lines @@
   DartFrame* frame = frames.NextFrame();
   while (frame != NULL) {
     if (count == frame_index) {
       // Find the function corresponding to this frame and check if it
       // matches the function name passed in.
       const Function& function =
           Function::Handle(frame->LookupDartFunction());
       if (function.IsNull()) {
         FATAL("StackFrame_validateFrame fails, invalid dart frame.\n");
       }
+      const Code& code = Code::Handle(frame->LookupDartCode());
+      EXPECT(code.raw() == function.unoptimized_code());
       const char* name = function.ToFullyQualifiedCString();
       // Currently all unit tests are loaded as being part of dart:core-lib.
       Isolate* isolate = Isolate::Current();
       String& url = String::Handle(String::New(TestCase::url()));
       const Library& lib = Library::Handle(Library::LookupLibrary(url));
       ASSERT(!lib.IsNull());
       const char* lib_name = String::Handle(lib.url()).ToCString();
       intptr_t length = OS::SNPrint(NULL, 0, "%s_%s", lib_name, expected_name);
       char* full_name = reinterpret_cast<char*>(
           isolate->current_zone()->Allocate(length + 1));
@@ skipping 185 matching lines @@
       reinterpret_cast<Dart_NativeEntryResolver>(native_lookup));
   Dart_InvokeStatic(lib,
                     Dart_NewString("StackFrame2Test"),
                     Dart_NewString("testMain"),
                     0,
                     NULL);
 }
 #endif  // TARGET_ARCH_IA32 || TARGET_ARCH_X64.
 
 }  // namespace dart