[compiler] Whenever we want source positions, record that in the CompilationInfo.

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 1012 matching lines @@
 
   profile->Delete();
 }
 
 // This tests checks distribution of the samples through the source lines.
 static void TickLines(bool optimize) {
   if (!optimize) i::FLAG_crankshaft = false;
   CcTest::InitializeVM();
   LocalContext env;
   i::FLAG_allow_natives_syntax = true;
-  i::FLAG_turbo_source_positions = true;
   i::Isolate* isolate = CcTest::i_isolate();
   i::Factory* factory = isolate->factory();
   i::HandleScope scope(isolate);
 
   i::EmbeddedVector<char, 512> script;
   i::EmbeddedVector<char, 64> optimize_call;
 
   const char* func_name = "func";
   if (optimize) {
     i::SNPrintF(optimize_call, "%%OptimizeFunctionOnNextCall(%s);\n",
@@ skipping 1126 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);
 }