Convert ProcessSingleton ui_test to browser_test.

chrome/chrome_tests.gypi

Index: chrome/chrome_tests.gypi
===================================================================
--- chrome/chrome_tests.gypi	(revision 133238)
+++ chrome/chrome_tests.gypi	(working copy)
@@ -734,7 +734,6 @@
         # New tests should be browser_tests. browser_tests are sharded and are
         # less flakier.
         'browser/process_singleton_linux_uitest.cc',
-        'browser/process_singleton_uitest.cc',
         'browser/session_history_uitest.cc',
         'browser/sessions/session_restore_uitest.cc',
         'browser/ui/tests/browser_uitest.cc',
@@ -777,12 +776,6 @@
             '../ui/aura/aura.gyp:aura',
           ],
         }],
-        ['OS=="mac"', {
-          'sources!': [
-            # ProcessSingletonMac doesn't do anything.
-            'browser/process_singleton_uitest.cc',
-          ],
-        }],
         ['OS=="win"', {
           'include_dirs': [
             '<(DEPTH)/third_party/wtl/include',
@@ -2904,6 +2897,7 @@
         'browser/printing/cloud_print/test/cloud_print_proxy_process_browsertest.cc',
         'browser/printing/printing_layout_browsertest.cc',
         'browser/printing/print_preview_tab_controller_browsertest.cc',
+        'browser/process_singleton_browsertest.cc',
         'browser/profiles/profile_browsertest.cc',
         'browser/profiles/profile_manager_browsertest.cc',
         'browser/protector/default_search_provider_change_browsertest.cc',
@@ -3341,6 +3335,8 @@
             # TODO(hbono): This test depends on hunspell and we cannot run it on
             # Mac, which does not use hunspell by default.
             'browser/spellchecker/spellcheck_host_browsertest.cc',
+            # ProcessSingletonMac doesn't do anything.
+            'browser/process_singleton_browsertest.cc',            
           ],
         }, { # else: OS != "mac"
           'sources!': [