Fix a debugger step regression

runtime/vm/debugger.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 "vm/debugger.h"
 
 #include "include/dart_api.h"
 
 #include "vm/code_generator.h"
 #include "vm/code_patcher.h"
@@ skipping 1641 matching lines @@
     }
   } else {
     ASSERT((resume_action_ == kContinue) || (resume_action_ == kSingleStep));
     // Nothing to do here. Any potential instrumentation will be removed
     // below. Single stepping is handled by the single step callback.
   }
 
   if (func_to_instrument.IsNull() ||
       (func_to_instrument.raw() != bpt->function())) {
     RemoveInternalBreakpoints();  // *bpt is now invalid.
-    if (!func_to_instrument.IsNull()) {
-      InstrumentForStepping(func_to_instrument);
-    }
+  }
+  if (!func_to_instrument.IsNull()) {
+    InstrumentForStepping(func_to_instrument);
   }
 }
 
 
 void Debugger::Initialize(Isolate* isolate) {
   if (initialized_) {
     return;
   }
   isolate_ = isolate;
   // Create a port here, we don't expect to receive any messages on this port.
@@ skipping 180 matching lines @@
 }
 
 
 void Debugger::RegisterCodeBreakpoint(CodeBreakpoint* bpt) {
   ASSERT(bpt->next() == NULL);
   bpt->set_next(code_breakpoints_);
   code_breakpoints_ = bpt;
 }
 
 }  // namespace dart