Update comments about CSP in polymer

pkg/polymer/lib/builder.dart

Index: pkg/polymer/lib/builder.dart
diff --git a/pkg/polymer/lib/builder.dart b/pkg/polymer/lib/builder.dart
index 6a7ae45ae758223ca4ddab1b31f8cdd07f81a19f..1ddefc8cb4517a4a4668d166629e45fc38d25fd5 100644
--- a/pkg/polymer/lib/builder.dart
+++ b/pkg/polymer/lib/builder.dart
@@ -256,8 +256,8 @@ class CommandLineOptions {
 ///   * `--deploy`: force deploy.
 ///   * `--no-js`: deploy replaces *.dart scripts with *.dart.js. You can turn
 ///     this feature off with --no-js, which leaves "packages/browser/dart.js".
-///   * `--csp`: replaces *.dart with *.dart.precompiled.js to comply with
-///     Content Security Policy restrictions.
+///   * `--csp`: extracts inlined JavaScript code to comply with Content
+///     Security Policy restrictions.
 ///   * `--help`: print documentation for each option and exit.
 ///
 /// Currently not all the flags are used by [lint] or [deploy] above, but they
@@ -293,7 +293,7 @@ CommandLineOptions parseOptions([List<String> args]) {
         'leaves "packages/browser/dart.js" to do the replacement at runtime.',
         defaultsTo: true)
     ..addFlag('csp', help:
-        'replaces *.dart with *.dart.precompiled.js to comply with \n'
+        'extracts inlined JavaScript code to comply with \n'
         'Content Security Policy restrictions.')
     ..addFlag('debug', help:
         'run in debug mode. For example, use the debug polyfill \n'