Update comments about CSP in polymer

pkg/polymer/lib/src/build/common.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 /// Common methods used by transfomers.
 library polymer.src.build.common;
 
 import 'dart:async';
 
 import 'package:analyzer/src/generated/ast.dart';
@@ skipping 49 matching lines @@
   final List<String> entryPoints;
 
   /// Map of stylesheet paths that should or should not be inlined. The paths
   /// are relative to the package root and are represented using posix style,
   /// which matches the representation used in asset ids in barback.
   ///
   /// There is an additional special key 'default' for the global default.
   final Map<String, bool> inlineStylesheets;
 
   /// True to enable Content Security Policy.
-  /// This means the HTML page will include *.dart.precompiled.js
-  ///
-  /// This flag has no effect unless [directlyIncludeJS] is enabled.
+  /// This means the HTML page will not have inlined .js code.
   final bool contentSecurityPolicy;
 
   /// True to include the compiled JavaScript directly from the HTML page.
   /// If enabled this will remove "packages/browser/dart.js" and replace
   /// `type="application/dart"` scripts with equivalent *.dart.js files.
-  ///
-  /// If [contentSecurityPolicy] enabled, this will reference files
-  /// named *.dart.precompiled.js.
   final bool directlyIncludeJS;
 
   /// Run transformers to create a releasable app. For example, include the
   /// minified versions of the polyfills rather than the debug versions.
   final bool releaseMode;
 
   /// This will make a physical element appear on the page showing build logs.
   /// It will only appear when ![releaseMode] even if this is true.
   final bool injectBuildLogsInOutput;
 
@@ skipping 178 matching lines @@
 /// Returns true if this is a valid custom element name. See:
 /// <http://w3c.github.io/webcomponents/spec/custom/#dfn-custom-element-type>
 bool isCustomTagName(String name) {
   if (name == null || !name.contains('-')) return false;
   return !invalidTagNames.containsKey(name);
 }
 
 /// Regex to split names in the 'attributes' attribute, which supports 'a b c',
 /// 'a,b,c', or even 'a b,c'. This is the same as in `lib/src/declaration.dart`.
 final ATTRIBUTES_REGEX = new RegExp(r'\s|,');