Split off remaining runtime functions in runtime.cc.

src/runtime/runtime-debug.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #include "src/accessors.h"
 #include "src/arguments.h"
 #include "src/debug.h"
 #include "src/deoptimizer.h"
@@ skipping 2714 matching lines @@
   CONVERT_ARG_HANDLE_CHECKED(JSObject, data, 0);
   isolate->debug()->OnAsyncTaskEvent(data);
   return isolate->heap()->undefined_value();
 }
 
 
 RUNTIME_FUNCTION(RuntimeReference_DebugIsActive) {
   SealHandleScope shs(isolate);
   return Smi::FromInt(isolate->debug()->is_active());
 }
+
+
+RUNTIME_FUNCTION(RuntimeReference_DebugBreakInOptimizedCode) {
+  UNIMPLEMENTED();
+  return NULL;
+}
 }
 }  // namespace v8::internal