Emit either csp or non-csp versions of the program.

pkg/compiler/lib/src/js_emitter/old_emitter/reflection_data_parser.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.
 
 part of dart2js.js_emitter;
 
 // TODO(ahe): Share these with js_helper.dart.
 const FUNCTION_INDEX = 0;
 const NAME_INDEX = 1;
 const CALL_NAME_INDEX = 2;
@@ skipping 209 matching lines @@
       if (optionalParameterCount) descriptor[unmangledName + "*"] = funcs[0];
     }
   }
 ''', [globalFunctionsAccess, interceptedNamesAccess,
       mangledGlobalNamesAccess, mangledNamesAccess]);
 
   List<jsAst.Statement> tearOffCode = buildTearOffCode(backend);
 
   jsAst.Statement init = js.statement('''{
   var functionCounter = 0;
-  var tearOffGetter = (typeof dart_precompiled == "function")
-      ? tearOffGetterCsp : tearOffGetterNoCsp;
   if (!#) # = [];  // embedded libraries.
   if (!#) # = map();  // embedded mangledNames.
   if (!#) # = map();  // embedded mangledGlobalNames.
   if (!#) # = map();  // embedded statics.
   if (!#) # = map();  // embedded typeInformation.
   if (!#) # = map();  // embedded globalFunctions.
   if (!#) # = map();  // embedded interceptedNames.
   var libraries = #;  // embeded libraries.
   var mangledNames = #;  // embedded mangledNames.
   var mangledGlobalNames = #;  // embedded mangledGlobalNames.
@@ skipping 89 matching lines @@
     tearOffAccessExpression = js(tearOffAccessText);
     tearOffGlobalObjectName = 'MissingHelperFunction';
     tearOffGlobalObject = '($tearOffAccessText())';
   }
 
   // This template is uncached because it is constructed from code fragments
   // that can change from compilation to compilation.  Some of these could be
   // avoided, except for the string literals that contain the compiled access
   // path to 'closureFromTearOff'.
   jsAst.Statement tearOffGetterNoCsp = js.uncachedStatementTemplate('''
-    function tearOffGetterNoCsp(funcs, reflectionInfo, name, isIntercepted) {
+    function tearOffGetter(funcs, reflectionInfo, name, isIntercepted) {
       return isIntercepted
           ? new Function("funcs", "reflectionInfo", "name",
                          "$tearOffGlobalObjectName", "c",
               "return function tearOff_" + name + (functionCounter++)+ "(x) {" +
                 "if (c === null) c = $tearOffAccessText(" +
                     "this, funcs, reflectionInfo, false, [x], name);" +
                 "return new c(this, funcs[0], x, name);" +
               "}")(funcs, reflectionInfo, name, $tearOffGlobalObject, null)
           : new Function("funcs", "reflectionInfo", "name",
                          "$tearOffGlobalObjectName", "c",
               "return function tearOff_" + name + (functionCounter++)+ "() {" +
                 "if (c === null) c = $tearOffAccessText(" +
                     "this, funcs, reflectionInfo, false, [], name);" +
                 "return new c(this, funcs[0], null, name);" +
               "}")(funcs, reflectionInfo, name, $tearOffGlobalObject, null);
     }''').instantiate([]);
 
   jsAst.Statement tearOffGetterCsp = js.statement('''
-    function tearOffGetterCsp(funcs, reflectionInfo, name, isIntercepted) {
+    function tearOffGetter(funcs, reflectionInfo, name, isIntercepted) {
       var cache = null;
       return isIntercepted
           ? function(x) {
               if (cache === null) cache = #(
                   this, funcs, reflectionInfo, false, [x], name);
               return new cache(this, funcs[0], x, name);
             }
           : function() {
               if (cache === null) cache = #(
                   this, funcs, reflectionInfo, false, [], name);
               return new cache(this, funcs[0], null, name);
             };
     }''', [tearOffAccessExpression, tearOffAccessExpression]);
 
   jsAst.Statement tearOff = js.statement('''
     function tearOff(funcs, reflectionInfo, isStatic, name, isIntercepted) {
       var cache;
       return isStatic
           ? function() {
               if (cache === void 0) cache = #(
                   this, funcs, reflectionInfo, true, [], name).prototype;
               return cache;
             }
           : tearOffGetter(funcs, reflectionInfo, name, isIntercepted);
     }''', tearOffAccessExpression);
 

[floitsch, 2014/12/17 15:03:38]

No need to build both variants.

jsAst.Statement tearOffGetter;
if (!compiler.useContentSecurityPolicy) {
  tearOffGetter = js.uncachedStatementTemplate('''...''');
} else {
  tearOffGetter = js.statement('''....''');
}

[zarah, 2014/12/18 08:22:16]

Done.

-  return <jsAst.Statement>[tearOffGetterNoCsp, tearOffGetterCsp, tearOff];
+  return <jsAst.Statement>[ compiler.useContentSecurityPolicy
+                            ? tearOffGetterCsp
+                            : tearOffGetterNoCsp,
+                            tearOff];
 }
 
 
 String readString(String array, String index) {
   return readChecked(
       array, index, 'result != null && typeof result != "string"', 'string');
 }
 
 String readInt(String array, String index) {
   return readChecked(
@@ skipping 17 matching lines @@
 (function() {
   var result = $array[$index];
   if ($check) {
     throw new Error(
         name + ": expected value of type \'$type\' at index " + ($index) +
         " but got " + (typeof result));
   }
   return result;
 })()''';
 }