Make Isolate::GetStackSample API support simulator

src/profiler/sampler.h

 // Copyright 2013 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.
 
 #ifndef V8_PROFILER_SAMPLER_H_
 #define V8_PROFILER_SAMPLER_H_
 
 #include "include/v8.h"
 
 #include "src/base/atomicops.h"
@@ skipping 123 matching lines @@
   base::Atomic32 registered_;
   PlatformData* data_;  // Platform specific data.
   // Counts stack samples taken in various VM states.
   bool is_counting_samples_;
   unsigned js_sample_count_;
   unsigned external_sample_count_;
   DISALLOW_IMPLICIT_CONSTRUCTORS(Sampler);
 };
 
 
+#if defined(USE_SIMULATOR)
+class SimulatorHelper : AllStatic {
+ public:
+  // Returns true if register values were successfully retrieved
+  // from the simulator, otherwise returns false.
+  static bool FillRegisters(Isolate* isolate, v8::RegisterState* state);
+};
+#endif  // USE_SIMULATOR
+
+
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_PROFILER_SAMPLER_H_