Remove all harmony runtime flags which shipped in M51

test/cctest/test-api.cc

 // Copyright 2012 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 18524 matching lines @@
       ->Run(env.local())
       .ToLocalChecked();
   v8::Local<v8::Function> f = v8::Local<v8::Function>::Cast(
       env->Global()->Get(env.local(), v8_str("f")).ToLocalChecked());
   CHECK_EQ(0,
            strcmp("foo.bar.baz", *v8::String::Utf8Value(f->GetInferredName())));
 }
 
 
 THREADED_TEST(FunctionGetDebugName) {
-  i::FLAG_harmony_function_name = true;
   LocalContext env;
   v8::HandleScope scope(env->GetIsolate());
   const char* code =
       "var error = false;"
       "function a() { this.x = 1; };"
       "a.displayName = 'display_a';"
       "var b = (function() {"
       "  var f = function() { this.x = 2; };"
       "  f.displayName = 'display_b';"
       "  return f;"
@@ skipping 1514 matching lines @@
   Visitor42 visitor(&object2);
   isolate->VisitHandlesForPartialDependence(&visitor);
   CHECK_EQ(1, visitor.counter_);
 
   object1.Reset();
   object2.Reset();
 }
 
 
 TEST(RegExp) {
-  i::FLAG_harmony_unicode_regexps = true;
   LocalContext context;
   v8::HandleScope scope(context->GetIsolate());
 
   v8::Local<v8::RegExp> re =
       v8::RegExp::New(context.local(), v8_str("foo"), v8::RegExp::kNone)
           .ToLocalChecked();
   CHECK(re->IsRegExp());
   CHECK(re->GetSource()->Equals(context.local(), v8_str("foo")).FromJust());
   CHECK_EQ(v8::RegExp::kNone, re->GetFlags());
 
@@ skipping 5252 matching lines @@
 }
 
 TEST(PrivateForApiIsNumber) {
   LocalContext context;
   v8::Isolate* isolate = CcTest::isolate();
   v8::HandleScope scope(isolate);
 
   // Shouldn't crash.
   v8::Private::ForApi(isolate, v8_str("42"));
 }