Include Web Notifications on Android at build-time.

chrome/chrome_tests.gypi

Index: chrome/chrome_tests.gypi
diff --git a/chrome/chrome_tests.gypi b/chrome/chrome_tests.gypi
index df19165a13b8ae99283b2a5f685d0a82368e7bc3..a9a7f4eb37b408771e288eb5a11b1d81d548626e 100644
--- a/chrome/chrome_tests.gypi
+++ b/chrome/chrome_tests.gypi
@@ -1443,6 +1443,15 @@
             ['exclude', '^browser/extensions/notifications_apitest.cc'],
           ],
         }],
+        ['OS=="android"', {
+          'sources!': [
+            # Android does not use the message center-based Notification system.
+            'browser/notifications/message_center_notifications_browsertest.cc',
+
+            # TODO(peter): Enable the Notification browser tests.
+            'browser/notifications/notification_browsertest.cc',
+          ]
+        }],
         ['toolkit_views==1', {
           'dependencies': [
             '../ui/views/controls/webview/webview_tests.gyp:webview_test_support',