Fix web components tests - package bots use the .html as is, no more %TEST_SOURCE%

BUG=

Review URL: https://codereview.chromium.org//646683003
diff --git a/.status b/.status
index b3def4b..2ef412d 100644
--- a/.status
+++ b/.status
@@ -11,13 +11,15 @@
 */*/*/*/packages/*/*: Skip
 */*/*/*/*/packages/*/*: Skip
 
-build/*: Skip  # nothing requires pub-build
-
 [ $compiler == none && ($runtime == dartium || $runtime == ContentShellOnAndroid) ]
 test/interop_test: Pass, RuntimeError # Issue 18931
 
 [ $compiler == dart2js && $csp && $runtime == drt ]
-test/interop_test: Fail # Issue 19329
+build/test/interop_test: Fail # Issue 19329
 
 [ $runtime == vm || $runtime == d8 || $runtime == jsshell ]
 test/*: Skip # uses dart:html
+build/test/*: Skip # uses dart:html
+
+[ $compiler == dart2js ]
+test/*: Skip # use pub-build to run tests (they need the companion .html file)
diff --git a/pubspec.yaml b/pubspec.yaml
index e307b69..4f21a81 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -11,5 +11,6 @@
   bundle code and HTML as if they were libraries.
 dev_dependencies:
   unittest: '>0.11.0 <0.12.0'
+  browser: '>0.10.0 <0.11.0'
 environment:
   sdk: ">=1.4.0-dev.6.6 <2.0.0"
diff --git a/test/interop_test.html b/test/interop_test.html
index bd5a95a..9b3e5fa 100644
--- a/test/interop_test.html
+++ b/test/interop_test.html
@@ -78,6 +78,7 @@
   <x-d id="i4"></x-d>
   <script type="text/javascript"
       src="/root_dart/tools/testing/dart/test_controller.js"></script>
-  %TEST_SCRIPTS%
+  <script type="application/dart" src="interop_test.dart"></script>
+  <script type="text/javascript" src="/packages/browser/dart.js"></script>
 </body>
 </html>
diff --git a/test/location_wrapper_test.html b/test/location_wrapper_test.html
index 3d264b1..21d59fd 100644
--- a/test/location_wrapper_test.html
+++ b/test/location_wrapper_test.html
@@ -17,6 +17,7 @@
   <h1> Running template_wrappers_test </h1>
   <script type="text/javascript"
       src="/root_dart/tools/testing/dart/test_controller.js"></script>
-  %TEST_SCRIPTS%
+  <script type="application/dart" src="location_wrapper_test.dart"></script>
+  <script type="text/javascript" src="/packages/browser/dart.js"></script>
 </body>
 </html>