Move generated files to gen/.

karma.conf.js

Index: karma.conf.js
diff --git a/karma.conf.js b/karma.conf.js
index 81ed8066c1b30af480651337a31da3ec3df57424..74ea15242c05be8a2266c2dde5378a8f740f571c 100644
--- a/karma.conf.js
+++ b/karma.conf.js
@@ -16,23 +16,23 @@ module.exports = function(config) {
       'lib/runtime/dart_*.js',
       'lib/runtime/dart/*.js',
       // {pattern: 'test/browser/*.js', included: false}
-      'test/codegen/expect/async_helper/async_helper.js',
-      'test/codegen/expect/dom/dom.js',
-      'test/codegen/expect/expect/expect.js',
-      'test/codegen/expect/path/path.js',
-      'test/codegen/expect/stack_trace/stack_trace.js',
-      'test/codegen/expect/js/js.js',
-      'test/codegen/expect/matcher/matcher.js',
-      'test/codegen/expect/unittest/unittest.js',
-      'test/codegen/expect/syncstar_syntax.js',
-      'test/codegen/expect/language/**.js',
-      'test/codegen/expect/language/sub/sub.js',
-      'test/codegen/expect/language/*.lib',
-      'test/codegen/expect/corelib/**.js',
-      'test/codegen/expect/lib/convert/**.js',
-      'test/codegen/expect/lib/html/**.js',
-      'test/codegen/expect/lib/math/**.js',
-      'test/codegen/expect/lib/typed_data/**.js',
+      'gen/codegen_output/async_helper/async_helper.js',
+      'gen/codegen_output/dom/dom.js',
+      'gen/codegen_output/expect/expect.js',
+      'gen/codegen_output/path/path.js',
+      'gen/codegen_output/stack_trace/stack_trace.js',
+      'gen/codegen_output/js/js.js',
+      'gen/codegen_output/matcher/matcher.js',
+      'gen/codegen_output/unittest/unittest.js',
+      'gen/codegen_output/syncstar_syntax.js',
+      'gen/codegen_output/language/**.js',
+      'gen/codegen_output/language/sub/sub.js',
+      'gen/codegen_output/language/*.lib',
+      'gen/codegen_output/corelib/**.js',
+      'gen/codegen_output/lib/convert/**.js',
+      'gen/codegen_output/lib/html/**.js',
+      'gen/codegen_output/lib/math/**.js',
+      'gen/codegen_output/lib/typed_data/**.js',
       'test/browser/*.js',
       'test-main.js',
     ],