Revert of [profiler] reduce incorrectly unaccounted ticks.

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 603 matching lines @@
   CheckSimpleBranch(env.local(), foo_node, bar_branch, arraysize(bar_branch));
   const char* baz_branch[] = {"baz", "delay", "loop"};
   CheckSimpleBranch(env.local(), foo_node, baz_branch, arraysize(baz_branch));
   const char* delay_branch[] = {"delay", "loop"};
   CheckSimpleBranch(env.local(), foo_node, delay_branch,
                     arraysize(delay_branch));
 
   profile->Delete();
 }
 
-static const char* cpu_profiler_toplevel_source =
-    "for (var i = 0; i < 1E5; i++) {"
-    "  var s = 0;"
-    "  for (var j = 0; j < 1E2; j++) s += i;"
-    "}";
-
-TEST(CollectOptimizedToplevelProfile) {
-  LocalContext env;
-  v8::HandleScope scope(env->GetIsolate());
-
-  v8::CpuProfiler* profiler = v8::CpuProfiler::New(env->GetIsolate());
-  v8::Local<v8::String> profile_name = v8_str("my_profile");
-
-  profiler->SetSamplingInterval(100);
-  profiler->StartProfiling(profile_name, true);
-  v8::internal::CpuProfiler* iprofiler =
-      reinterpret_cast<v8::internal::CpuProfiler*>(profiler);
-  v8::sampler::Sampler* sampler = iprofiler->processor()->sampler();
-  sampler->StartCountingSamples();
-
-  CompileRun(cpu_profiler_toplevel_source);
-
-  v8::CpuProfile* profile = profiler->StopProfiling(profile_name);
-  reinterpret_cast<i::CpuProfile*>(profile)->Print();
-
-  const v8::CpuProfileNode* root = profile->GetTopDownRoot();
-  v8::Local<v8::String> empty = v8::String::Empty(env->GetIsolate());
-  unsigned toplevel_hitcount = 0;
-  unsigned unaccounted_hitcount = 0;
-  for (int i = 0; i < root->GetChildrenCount(); i++) {
-    const v8::CpuProfileNode* child = root->GetChild(i);
-    if (empty->Equals(env.local(), child->GetFunctionName()).FromJust()) {
-      toplevel_hitcount += child->GetHitCount();
-    } else {
-      unaccounted_hitcount += child->GetHitCount();
-    }
-  }
-  // Check that we are getting more ticks from the toplevel function than
-  // unaccounted ticks.
-  DCHECK(toplevel_hitcount > unaccounted_hitcount);
-
-  profile->Delete();
-  profiler->Dispose();
-}
-
 static const char* hot_deopt_no_frame_entry_test_source =
     "%NeverOptimizeFunction(foo);\n"
     "%NeverOptimizeFunction(start);\n"
     "function foo(a, b) {\n"
     "  return a + b;\n"
     "}\n"
     "function start(timeout) {\n"
     "  var start = Date.now();\n"
     "  do {\n"
     "    for (var i = 1; i < 1000; ++i) foo(1, i);\n"
@@ skipping 1549 matching lines @@
   printf("Profile JSON: %s\n", profile_json.c_str());
   std::string code = profile_checker + profile_json + ")";
   v8::Local<v8::Value> result =
       CompileRunChecked(CcTest::isolate(), code.c_str());
   v8::String::Utf8Value value(result);
   printf("Check result: %*s\n", value.length(), *value);
   CHECK_EQ(0, value.length());
 
   i::V8::SetPlatformForTesting(old_platform);
 }