Revert r14252 as it broke --prof for some cases

test/cctest/test-profile-generator.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 606 matching lines @@
   generator.code_map()->AddCode(ToAddress(0x1500), entry1, 0x200);
   generator.code_map()->AddCode(ToAddress(0x1700), entry2, 0x100);
   generator.code_map()->AddCode(ToAddress(0x1900), entry3, 0x50);
 
   // We are building the following calls tree:
   //      -> aaa         - sample1
   //  aaa -> bbb -> ccc  - sample2
   //      -> ccc -> aaa  - sample3
   TickSample sample1;
   sample1.pc = ToAddress(0x1600);
+  sample1.tos = ToAddress(0x1500);
   sample1.stack[0] = ToAddress(0x1510);
   sample1.frames_count = 1;
   generator.RecordTickSample(sample1);
   TickSample sample2;
   sample2.pc = ToAddress(0x1925);
+  sample2.tos = ToAddress(0x1900);
   sample2.stack[0] = ToAddress(0x1780);
   sample2.stack[1] = ToAddress(0x10000);  // non-existent.
   sample2.stack[2] = ToAddress(0x1620);
   sample2.frames_count = 3;
   generator.RecordTickSample(sample2);
   TickSample sample3;
   sample3.pc = ToAddress(0x1510);
+  sample3.tos = ToAddress(0x1500);
   sample3.stack[0] = ToAddress(0x1910);
   sample3.stack[1] = ToAddress(0x1610);
   sample3.frames_count = 2;
   generator.RecordTickSample(sample3);
 
   CpuProfile* profile =
       profiles.StopProfiling(TokenEnumerator::kNoSecurityToken, "", 1);
   CHECK_NE(NULL, profile);
   ProfileTreeTestHelper top_down_test_helper(profile->top_down());
   CHECK_EQ(NULL, top_down_test_helper.Walk(entry2));
@@ skipping 274 matching lines @@
     i::OS::SNPrintF(title, "%d", i);
     // UID must be > 0.
     CHECK(collection.StartProfiling(title.start(), i + 1, false));
     titles[i] = title.start();
   }
   CHECK(!collection.StartProfiling(
       "maximum", CpuProfilesCollection::kMaxSimultaneousProfiles + 1, false));
   for (int i = 0; i < CpuProfilesCollection::kMaxSimultaneousProfiles; ++i)
     i::DeleteArray(titles[i]);
 }