Make BrowserAccessibilityManager cross platform. Step 1....

chrome/chrome_tests.gypi

Index: chrome/chrome_tests.gypi
===================================================================
--- chrome/chrome_tests.gypi	(revision 61015)
+++ chrome/chrome_tests.gypi	(working copy)
@@ -796,6 +796,7 @@
         'app/breakpad_mac_stubs.mm',
         'app/chrome_dll.rc',
         # All unittests in browser, common, renderer and service.
+        'browser/accessibility/browser_accessibility_win_unittest.cc',
         'browser/app_controller_mac_unittest.mm',
         'browser/autocomplete_history_manager_unittest.cc',
         'browser/autocomplete/autocomplete_edit_unittest.cc',
@@ -846,7 +847,6 @@
         'browser/bookmarks/bookmark_model_unittest.cc',
         'browser/bookmarks/bookmark_utils_unittest.cc',
         'browser/browser_about_handler_unittest.cc',
-        'browser/browser_accessibility_win_unittest.cc',
         'browser/browser_commands_unittest.cc',
         'browser/themes/browser_theme_pack_unittest.cc',
         'browser/themes/browser_theme_provider_unittest.cc',
@@ -1594,9 +1594,9 @@
         }, { # else: OS != "win"
           'sources!': [
             'app/chrome_dll.rc',
+            'browser/accessibility/browser_accessibility_win_unittest.cc',
             'browser/bookmarks/bookmark_codec_unittest.cc',
             'browser/bookmarks/bookmark_drag_data_unittest.cc',
-            'browser/browser_accessibility_win_unittest.cc',
             'browser/chrome_plugin_unittest.cc',
             'browser/extensions/extension_process_manager_unittest.cc',
             'browser/login_prompt_unittest.cc',