Introduce collective --harmony flag.

src/v8.cc

Index: src/v8.cc
diff --git a/src/v8.cc b/src/v8.cc
index aebcc2f1d945104b5708673920737d6a80c8e621..a66fa2219900da17db8743ff5a6e306326c26372 100644
--- a/src/v8.cc
+++ b/src/v8.cc
@@ -57,6 +57,15 @@ static EntropySource entropy_source;
 
 
 bool V8::Initialize(Deserializer* des) {
+  // Setting --harmony implies all other harmony flags.
+  // TODO(rossberg): Is there a better place to put this?

[Steven, 2011/10/12 11:54:38]

This is indeed not such a cool place to put it. You could consider putting it at
the end of  FlagList::SetFlagsFromCommandLine in flags.cc or 
doing something in Shell::SetOptions in d8.cc. At least that would group this
code with other options/flags code.

[rossberg, 2011/10/12 12:06:56]

Well, I think flags.cc would be the wrong place to put it, since that should be
generic and hence oblivious to individual flags. (It would also create a
circular dependency, I suspect.)

D8 is also the wrong place, because then it will only work for D8. ;-)

Ideally, flags.cc would provide a generic way to express implications between
flags. But that is clearly overkill at this point

+  if (FLAG_harmony) {
+    FLAG_harmony_typeof = true;
+    FLAG_harmony_scoping = true;
+    FLAG_harmony_proxies = true;
+    FLAG_harmony_weakmaps = true;
+  }
+
   InitializeOncePerProcess();
 
   // The current thread may not yet had entered an isolate to run.