Revert r14252 as it broke --prof for some cases

test/cctest/test-cpu-profiler.cc

 // Copyright 2010 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 46 matching lines @@
 static inline i::Address ToAddress(int n) {
   return reinterpret_cast<i::Address>(n);
 }
 
 static void EnqueueTickSampleEvent(ProfilerEventsProcessor* proc,
                                    i::Address frame1,
                                    i::Address frame2 = NULL,
                                    i::Address frame3 = NULL) {
   i::TickSample* sample = proc->TickSampleEvent();
   sample->pc = frame1;
+  sample->tos = frame1;
   sample->frames_count = 0;
   if (frame2 != NULL) {
     sample->stack[0] = frame2;
     sample->frames_count = 1;
   }
   if (frame3 != NULL) {
     sample->stack[1] = frame3;
     sample->frames_count = 2;
   }
 }
@@ skipping 154 matching lines @@
   ProfilerEventsProcessor processor(&generator);
   processor.Start();
 
   processor.CodeCreateEvent(i::Logger::BUILTIN_TAG,
                             "bbb",
                             ToAddress(0x1200),
                             0x80);
 
   i::TickSample* sample = processor.TickSampleEvent();
   sample->pc = ToAddress(0x1200);
+  sample->tos = 0;
   sample->frames_count = i::TickSample::kMaxFramesCount;
   for (int i = 0; i < sample->frames_count; ++i) {
     sample->stack[i] = ToAddress(0x1200);
   }
 
   processor.Stop();
   processor.Join();
   CpuProfile* profile =
       profiles.StopProfiling(TokenEnumerator::kNoSecurityToken, "", 1);
   CHECK_NE(NULL, profile);
@@ skipping 285 matching lines @@
 
   const char* barBranch[] = { "bar", "delay", "loop" };
   CheckSimpleBranch(fooNode, barBranch, ARRAY_SIZE(barBranch));
   const char* bazBranch[] = { "baz", "delay", "loop" };
   CheckSimpleBranch(fooNode, bazBranch, ARRAY_SIZE(bazBranch));
   const char* delayBranch[] = { "delay", "loop" };
   CheckSimpleBranch(fooNode, delayBranch, ARRAY_SIZE(delayBranch));
 
   cpu_profiler->DeleteAllCpuProfiles();
 }