Handle all debugger stepping with the isolate single step flag

runtime/vm/code_generator.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/code_generator.h"
 
 #include "vm/assembler.h"
 #include "vm/ast.h"
 #include "vm/bigint_operations.h"
 #include "vm/code_patcher.h"
@@ skipping 803 matching lines @@
   uword orig_stub =
       isolate->debugger()->GetPatchedStubAddress(caller_frame->pc());
   isolate->debugger()->SignalBpReached();
   ASSERT((orig_stub & kSmiTagMask) == kSmiTag);
   arguments.SetReturn(Smi::Handle(reinterpret_cast<RawSmi*>(orig_stub)));
 }
 
 
 DEFINE_RUNTIME_ENTRY(SingleStepHandler, 0) {
   ASSERT(isolate->debugger() != NULL);
-  isolate->debugger()->SingleStepCallback();
+  isolate->debugger()->DebuggerStepCallback();
 }
 
 
 static RawFunction* InlineCacheMissHandler(
     const GrowableArray<const Instance*>& args,
     const ICData& ic_data) {
   const Instance& receiver = *args[0];
   const Code& target_code =
       Code::Handle(ResolveCompileInstanceCallTarget(receiver, ic_data));
   if (target_code.IsNull()) {
@@ skipping 869 matching lines @@
 // of the given value.
 //   Arg0: Field object;
 //   Arg1: Value that is being stored.
 DEFINE_RUNTIME_ENTRY(UpdateFieldCid, 2) {
   const Field& field = Field::CheckedHandle(arguments.ArgAt(0));
   const Object& value = Object::Handle(arguments.ArgAt(1));
   field.UpdateGuardedCidAndLength(value);
 }
 
 }  // namespace dart