Remove kDisableDownloadNotification and stop compiling shelf code on

chrome/chrome_tests_unit.gypi

Index: chrome/chrome_tests_unit.gypi
diff --git a/chrome/chrome_tests_unit.gypi b/chrome/chrome_tests_unit.gypi
index e71db9606ad0d0eb4c9fac510e39d1694f04d136..cb633979e82edb1fc41786f3499d5d678f8eab78 100644
--- a/chrome/chrome_tests_unit.gypi
+++ b/chrome/chrome_tests_unit.gypi
@@ -1467,7 +1467,6 @@
       'browser/diagnostics/diagnostics_controller_unittest.cc',
       'browser/diagnostics/diagnostics_model_unittest.cc',
       'browser/download/download_commands_unittest.cc',
-      'browser/download/download_shelf_unittest.cc',
       'browser/first_run/first_run_unittest.cc',
       'browser/font_family_cache_unittest.cc',
       'browser/importer/firefox_profile_lock_unittest.cc',
@@ -1601,6 +1600,7 @@
     ],
     # Everything but Android, ChromeOS and iOS (iOS is handled separately).
     'chrome_unit_tests_non_android_or_chromeos_sources': [
+      'browser/download/download_shelf_unittest.cc',
       'browser/signin/cross_device_promo_unittest.cc',
       'browser/signin/signin_global_error_unittest.cc',
       'browser/sync/sync_global_error_unittest.cc',
@@ -1989,6 +1989,10 @@
             'browser/chromeos/system/fake_input_device_settings.cc',
             'browser/chromeos/system/fake_input_device_settings.h',
           ],
+          'sources!': [
+            'browser/download/test_download_shelf.cc',
+            'browser/download/test_download_shelf.h',
+          ],
         }],
         ['use_aura==1', {
           'sources': [