Fix asserts in StackFrameIterator which were effectively disabled

runtime/vm/deopt_instructions.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 "vm/deopt_instructions.h"
 
 #include "vm/assembler.h"
 #include "vm/code_patcher.h"
 #include "vm/compiler.h"
 #include "vm/disassembler.h"
@@ skipping 398 matching lines @@
   // Compute total number of artificial arguments used during deoptimization.
   intptr_t deopt_arg_count = 0;
   for (intptr_t i = 0; i < DeferredObjectsCount(); i++) {
     GetDeferredObject(i)->Fill();
     deopt_arg_count += GetDeferredObject(i)->ArgumentCount();
   }
 
   // Since this is the only step where GC can occur during deoptimization,
   // use it to report the source line where deoptimization occured.
   if (FLAG_trace_deoptimization || FLAG_trace_deoptimization_verbose) {
-    DartFrameIterator iterator;
+    DartFrameIterator iterator(Thread::Current(),
+                               StackFrameIterator::kNoCrossThreadIteration);
     StackFrame* top_frame = iterator.NextFrame();
     ASSERT(top_frame != NULL);
     const Code& code = Code::Handle(top_frame->LookupDartCode());
     const Function& top_function = Function::Handle(code.function());
     const Script& script = Script::Handle(top_function.script());
     const TokenPosition token_pos = code.GetTokenIndexOfPC(top_frame->pc());
     intptr_t line, column;
     script.GetTokenLocation(token_pos, &line, &column);
     String& line_string = String::Handle(script.GetLine(line));
     THR_Print("  Function: %s\n", top_function.ToFullyQualifiedCString());
@@ skipping 942 matching lines @@
                           Smi* offset,
                           TypedData* info,
                           Smi* reason) {
   intptr_t i = index * kEntrySize;
   *offset ^= table.At(i);
   *info ^= table.At(i + 1);
   *reason ^= table.At(i + 2);
 }
 
 }  // namespace dart