Deprecate automatic generation of precompiled.js.

sdk/lib/_internal/compiler/implementation/js_emitter/code_emitter_task.dart

 // Copyright (c) 2012, 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;
 
 /**
  * Generates the code for all used classes in the program. Static fields (even
  * in classes) are ignored, since they can be treated as non-class elements.
  *
@@ skipping 1512 matching lines @@
 
       emitMain(mainBuffer);
       jsAst.FunctionDeclaration precompiledFunctionAst =
           buildPrecompiledFunction();
       emitInitFunction(mainBuffer);
       if (!compiler.deferredLoadTask.splitProgram) {
         mainBuffer.add('})()\n');
       } else {
         mainBuffer.add('\n');
       }
+
+      if (compiler.useContentSecurityPolicy) {
+        mainBuffer.write(
+            jsAst.prettyPrint(
+                precompiledFunctionAst, compiler,
+                allowVariableMinification: false).getText());
+      }
+
       String assembledCode = mainBuffer.getText();
       String sourceMapTags = "";
       if (generateSourceMap) {
         outputSourceMap(assembledCode, mainBuffer, '',
             compiler.sourceMapUri, compiler.outputUri);
         sourceMapTags =
             generateSourceMapTag(compiler.sourceMapUri, compiler.outputUri);
       }
       compiler.outputProvider('', 'js')
           ..add(assembledCode)
           ..add(sourceMapTags)
           ..close();
       compiler.assembledCode = assembledCode;
 
-      mainBuffer.write(
-          jsAst.prettyPrint(
-              precompiledFunctionAst, compiler,
-              allowVariableMinification: false).getText());
+      if (!compiler.useContentSecurityPolicy) {
+        mainBuffer.write("""
+{
+  var message = 
+      'Deprecation: Automatic generation of output for Content Security\\n' +
+      'Policy is deprecated and will be removed with the next development\\n' +
+      'release. Use the --csp option to generate CSP restricted output.';
+  if (typeof dartPrint == "function") {
+    dartPrint(message);
+  } else if (typeof console == "object" && typeof console.log == "function") {
+    console.log(message);
+  } else if (typeof print == "function") {
+    print(message);
+  }
+}\n""");
 
-      compiler.outputProvider('', 'precompiled.js')
-          ..add(mainBuffer.getText())
-          ..close();
+        mainBuffer.write(
+            jsAst.prettyPrint(
+                precompiledFunctionAst, compiler,
+                allowVariableMinification: false).getText());
 
+        compiler.outputProvider('', 'precompiled.js')
+            ..add(mainBuffer.getText())
+            ..close();
+      }
       emitDeferredCode();
 
     });
     return compiler.assembledCode;
   }
 
   String generateSourceMapTag(Uri sourceMapUri, Uri fileUri) {
     if (sourceMapUri != null && fileUri != null) {
       // Using # is the new proposed standard. @ caused problems in Internet
       // Explorer due to "Conditional Compilation Statements" in JScript,
@@ skipping 111 matching lines @@
     String sourceMap = sourceMapBuilder.build(compiledFile);
     compiler.outputProvider(name, 'js.map')
         ..add(sourceMap)
         ..close();
   }
 
   void registerReadTypeVariable(TypeVariableElement element) {
     readTypeVariables.add(element);
   }
 }