Rename apiimpl.Compiler to CompilerImpl.

tests/compiler/dart2js/analyze_dart2js_helpers_test.dart

Index: tests/compiler/dart2js/analyze_dart2js_helpers_test.dart
diff --git a/tests/compiler/dart2js/analyze_dart2js_helpers_test.dart b/tests/compiler/dart2js/analyze_dart2js_helpers_test.dart
index 0787dd30da994ed741373a8cafb70abb78c47d71..e4b9326d75ae90cd36bdedd5d22c4ffc857993ce 100644
--- a/tests/compiler/dart2js/analyze_dart2js_helpers_test.dart
+++ b/tests/compiler/dart2js/analyze_dart2js_helpers_test.dart
@@ -10,7 +10,7 @@ import 'package:async_helper/async_helper.dart';
 import 'package:compiler/compiler_new.dart' show
     Diagnostic;
 import 'package:compiler/src/apiimpl.dart' show
-    Compiler;
+    CompilerImpl;
 import 'package:compiler/src/commandline_options.dart';
 import 'package:compiler/src/constants/expressions.dart' show
     ConstructedConstantExpression;
@@ -44,7 +44,7 @@ main(List<String> arguments) {
     options.add(Flags.verbose);
   }
   asyncTest(() async {
-    Compiler compiler = compilerFor(
+    CompilerImpl compiler = compilerFor(
         options: options, showDiagnostics: verbose);
     FormattingDiagnosticHandler diagnostics =
         new FormattingDiagnosticHandler(compiler.provider);