Add a content-security-policy (CSP) flag.

lib/compiler/implementation/js_backend/native_emitter.dart

Index: lib/compiler/implementation/js_backend/native_emitter.dart
diff --git a/lib/compiler/implementation/js_backend/native_emitter.dart b/lib/compiler/implementation/js_backend/native_emitter.dart
index 065a43d3fc9ffd42dc5496f44f60514d4516233c..9218e6501ae4b70a047d9ef9738897a43a9b3826 100644
--- a/lib/compiler/implementation/js_backend/native_emitter.dart
+++ b/lib/compiler/implementation/js_backend/native_emitter.dart
@@ -94,6 +94,14 @@ class NativeEmitter {
       => '${backend.namer.CURRENT_ISOLATE}.\$defineNativeClass';
 
   String get defineNativeClassFunction {
+    if (emitter.useContentSecurityPolicy) {
+      return """
+function(cls, methods) {
+  for (var method in methods) {
+    $dynamicName(method)[cls] = methods[method];
+  }
+}""";
+    }
     return """
 function(cls, fields, methods) {
   var generateGetterSetter = ${emitter.generateGetterSetterFunction};
@@ -157,20 +165,32 @@ function(cls, fields, methods) {
     }
 
     CodeBuffer fieldBuffer = new CodeBuffer();
-    List<String> checkedSetters =
-        emitter.emitClassFields(classElement, fieldBuffer);
+    List<String> explicitGettersSetters;
+
+    if (emitter.useContentSecurityPolicy) {
+      explicitGettersSetters =
+          emitter.emitClassConstructorGettersSetters(classElement, fieldBuffer);
+      // We don't need the constructor for native classes.
+      fieldBuffer.clear();
+    } else {
+      explicitGettersSetters =
+          emitter.emitClassFields(classElement, fieldBuffer);
+      fieldBuffer.add(", ");
+    }
 
     CodeBuffer methodBuffer = new CodeBuffer();
     emitter.emitInstanceMembers(classElement, methodBuffer, false);
 
-    if (methodBuffer.isEmpty() && fieldBuffer.isEmpty()) return;
+    if (methodBuffer.isEmpty()
+        && fieldBuffer.isEmpty()
+        && explicitGettersSetters.isEmpty()) return;
 
     String nativeName = toNativeName(classElement);
-    nativeBuffer.add("$defineNativeClassName('$nativeName', [");
+    nativeBuffer.add("$defineNativeClassName('$nativeName', ");
     nativeBuffer.add(fieldBuffer);
-    nativeBuffer.add('], {');
-    if (!checkedSetters.isEmpty()) {
-      nativeBuffer.add('${Strings.join(checkedSetters, ",\n")}');
+    nativeBuffer.add('{');
+    if (!explicitGettersSetters.isEmpty()) {
+      nativeBuffer.add('${Strings.join(explicitGettersSetters, ",\n")}');
       nativeBuffer.add(',\n');
     }
     nativeBuffer.add(methodBuffer);