A problem with options parsing due to half-way converting from RunnerFlags

Cleans up the usage message for cmdline parsing, and passes the
object CompilerOptions (and friends) around instead of the array
of command line arguments.

Review URL: https://chromereviews.googleplex.com/3565012

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@187 260f80e4-7a28-3924-810f-c04153c831b5

compiler/java/com/google/dart/runner/JavaScriptLauncher.java

@@ -5,7 +5,6 @@
 package com.google.dart.runner;
 
 import java.io.PrintStream;
-import java.util.Set;
 
 /**
  * @author floitsch@google.com (Florian Loitsch)
@@ -13,7 +12,7 @@ import java.util.Set;
  */
 interface JavaScriptLauncher {
 
-  void execute(String jsScript, String sourceName, String[] args, Set<RunnerFlag> flags,
+  void execute(String jsScript, String sourceName, String[] args, RunnerOptions flags,
                PrintStream stdout, PrintStream stderr)
       throws RunnerError;