Introduce code stub constructors for stub keys.

test/cctest/test-code-stubs.cc

 // Copyright 2013 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 154 matching lines @@
 
   RunOneTruncationTest(3.868562622766813e+25, 0);
   RunOneTruncationTest(-3.868562622766813e+25, 0);
   RunOneTruncationTest(1.7976931348623157e+308, 0);
   RunOneTruncationTest(-1.7976931348623157e+308, 0);
 }
 
 #undef NaN
 #undef Infinity
 #undef RunOneTruncationTest
+
+
+TEST(CodeStubMajorKeys) {
+  CcTest::InitializeVM();

[mvstanton, 2014/09/04 14:23:59]

Yay! nice test :).

+  LocalContext context;
+  Isolate* isolate = CcTest::i_isolate();
+
+#define CHECK_STUB(NAME)                        \
+  {                                             \
+    HandleScope scope(isolate);                 \
+    NAME##Stub stub_impl(0xabcd, isolate);      \
+    CodeStub* stub = &stub_impl;                \
+    CHECK_EQ(stub->MajorKey(), CodeStub::NAME); \
+  }
+  CODE_STUB_LIST(CHECK_STUB);
+}