Fix asserts in StackFrameIterator which were effectively disabled

runtime/vm/simulator_arm.cc

 // Copyright (c) 2013, 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 <setjmp.h>  // NOLINT
 #include <stdlib.h>
 
 #include "vm/globals.h"
 #if defined(TARGET_ARCH_ARM)
 
@@ skipping 263 matching lines @@
     script.GetTokenLocation(token_pos, &line, &column);
   }
   OS::Print(
       "pc=0x%" Px " fp=0x%" Px " sp=0x%" Px " %s%s (%s:%" Pd ":%" Pd ")\n", pc,
       fp, sp, is_optimized ? (is_inlined ? "inlined " : "optimized ") : "",
       func_name.ToCString(), url.ToCString(), line, column);
 }
 
 
 void SimulatorDebugger::PrintBacktrace() {
-  StackFrameIterator frames(sim_->get_register(FP), sim_->get_register(SP),
-                            sim_->get_pc(),
-                            StackFrameIterator::kDontValidateFrames);
+  StackFrameIterator frames(
+      sim_->get_register(FP), sim_->get_register(SP), sim_->get_pc(),
+      StackFrameIterator::kDontValidateFrames, Thread::Current(), false);
   StackFrame* frame = frames.NextFrame();
   ASSERT(frame != NULL);
   Function& function = Function::Handle();
   Function& inlined_function = Function::Handle();
   Code& code = Code::Handle();
   Code& unoptimized_code = Code::Handle();
   while (frame != NULL) {
     if (frame->IsDartFrame()) {
       code = frame->LookupDartCode();
       function = code.function();
@@ skipping 3625 matching lines @@
   set_register(CODE_REG, code);
   set_register(PP, pp);
   buf->Longjmp();
 }
 
 }  // namespace dart
 
 #endif  // defined(USING_SIMULATOR)
 
 #endif  // defined TARGET_ARCH_ARM