Accurate function prototypes for native calls from ARM simulator.

src/sampler.cc

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 #if defined(__linux__) || defined(__FreeBSD__) || defined(__OpenBSD__) \
-    || defined(__NetBSD__) || defined(__sun) || defined(__ANDROID__)
+    || defined(__NetBSD__) || defined(__sun) || defined(__ANDROID__) \
+    || defined(__native_client__)
 
 #define USE_SIGNALS
 
 #include <errno.h>
 #include <pthread.h>
 #include <signal.h>
 #include <sys/time.h>
 #include <sys/syscall.h>
 #if !defined(__ANDROID__) || defined(__BIONIC_HAVE_UCONTEXT_T)
 #include <ucontext.h>
@@ skipping 654 matching lines @@
   SamplerThread::RemoveActiveSampler(this);
   SetActive(false);
 }
 
 void Sampler::SampleStack(TickSample* sample) {
   sample->Trace(isolate_);
   if (++samples_taken_ < 0) samples_taken_ = 0;
 }
 
 } }  // namespace v8::internal