Allow building without notification support.

chrome/chrome_tests.gypi

Index: chrome/chrome_tests.gypi
diff --git a/chrome/chrome_tests.gypi b/chrome/chrome_tests.gypi
index e7818943fb8eef55a680ac69f58b261988ef3e0a..b03a036ea8365ee2f1947909dd68c3d43c68bb7f 100644
--- a/chrome/chrome_tests.gypi
+++ b/chrome/chrome_tests.gypi
@@ -582,6 +582,11 @@
           # See comment about the same line in chrome/chrome_tests.gypi.
           'xcode_settings': {'OTHER_LDFLAGS': ['-Wl,-ObjC']},
         }],  # OS=="mac"
+        ['notifications==0', {
+          'sources/': [
+            ['exclude', '^browser/notifications/'],
+          ],
+        }],
         ['toolkit_views==1', {
           'dependencies': [
             '../views/views.gyp:views',
@@ -1962,6 +1967,11 @@
             ['exclude', '^browser/speech/'],
           ],
         }],
+        ['notifications==0', {
+          'sources/': [
+            ['exclude', '^browser/notifications/'],
+          ],
+        }],
         ['safe_browsing==1', {
           'defines': [
             'ENABLE_SAFE_BROWSING',
@@ -2659,6 +2669,11 @@
             ['exclude', '^../content/browser/speech/'],
           ],
         }],
+        ['notifications==0', {
+          'sources!': [
+            'browser/extensions/notifications_apitest.cc',
+          ],
+        }],
         ['safe_browsing==1', {
           'defines': [
             'ENABLE_SAFE_BROWSING',