Rename apiimpl.Compiler to CompilerImpl.

tests/compiler/dart2js/mirror_helper_rename_test.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.
 
 import "package:expect/expect.dart";
 import 'dart:async';
 import "package:async_helper/async_helper.dart";
 import 'memory_compiler.dart' show runCompiler, OutputCollector;
 import 'package:compiler/src/apiimpl.dart' show
-    Compiler;
+    CompilerImpl;
 import 'package:compiler/src/tree/tree.dart' show
     Node;
 import 'package:compiler/src/dart_backend/dart_backend.dart';
 import 'package:compiler/src/mirror_renamer/mirror_renamer.dart';
 
 main() {
   asyncTest(() async {
     await testWithMirrorHelperLibrary(minify: true);
     await testWithMirrorHelperLibrary(minify: false);
     await testWithoutMirrorHelperLibrary(minify: true);
     await testWithoutMirrorHelperLibrary(minify: false);
   });
 }
 
-Future<Compiler> run({OutputCollector outputCollector,
+Future<CompilerImpl> run({OutputCollector outputCollector,
                       bool useMirrorHelperLibrary: false,
                       bool minify: false}) async {
   List<String> options = ['--output-type=dart'];
   if (minify) {
     options.add('--minify');
   }
   var result = await runCompiler(
       memorySourceFiles: MEMORY_SOURCE_FILES,
       outputProvider: outputCollector,
       options: options,
-      beforeRun: (Compiler compiler) {
+      beforeRun: (CompilerImpl compiler) {
         DartBackend backend = compiler.backend;
         backend.useMirrorHelperLibrary = useMirrorHelperLibrary;
       });
   return result.compiler;
 }
 
 Future testWithMirrorHelperLibrary({bool minify}) async {
   OutputCollector outputCollector = new OutputCollector();
-  Compiler compiler = await run(
+  CompilerImpl compiler = await run(
       outputCollector: outputCollector,
       useMirrorHelperLibrary: true,
       minify: minify);
   DartBackend backend = compiler.backend;
   MirrorRenamerImpl mirrorRenamer = backend.mirrorRenamer;
   Map<Node, String> renames = backend.placeholderRenamer.renames;
   Map<String, String> symbols = mirrorRenamer.symbols;
 
   Expect.isFalse(null == mirrorRenamer.helperLibrary);
   Expect.isFalse(null == mirrorRenamer.getNameFunction);
@@ skipping 20 matching lines @@
     // Appears twice in code (defined & called).
     Expect.equals(2, i.length);
   }
 
   RegExp mapMatch = new RegExp('const<String,( )?String>');
   i = mapMatch.allMatches(output);
   Expect.equals(1, i.length);
 }
 
 Future testWithoutMirrorHelperLibrary({bool minify}) async {
-  Compiler compiler = await run(useMirrorHelperLibrary: false, minify: minify);
+  CompilerImpl compiler =
+      await run(useMirrorHelperLibrary: false, minify: minify);
   DartBackend backend = compiler.backend;
   MirrorRenamer mirrorRenamer = backend.mirrorRenamer;
 
   Expect.equals(null, mirrorRenamer.helperLibrary);
   Expect.equals(null, mirrorRenamer.getNameFunction);
 }
 
 const MEMORY_SOURCE_FILES = const <String, String> {
   'main.dart': """
 import 'dart:mirrors';
 
 class Foo {
   noSuchMethod(Invocation invocation) {
     MirrorSystem.getName(invocation.memberName);
   }
 }
 
 void main() {
   new Foo().fisk();
 }
 """};