linux_aura: Compile ash into chrome.

chrome/chrome_tests.gypi

Index: chrome/chrome_tests.gypi
diff --git a/chrome/chrome_tests.gypi b/chrome/chrome_tests.gypi
index b7d430f8f3066e923dd0aff2357222ecfbbe4e06..36a21b91c7ff116db229319127dfe3a9bb7e67ac 100644
--- a/chrome/chrome_tests.gypi
+++ b/chrome/chrome_tests.gypi
@@ -1798,10 +1798,20 @@
               ],
             }],
           ],
+        }, { # else: OS != "win"
+          'sources!': [
+            'app/chrome_command_ids.h',
+            'app/chrome_dll.rc',
+            'app/chrome_dll_resource.h',
+            'app/chrome_version.rc.version',
+          ],
+        }],
+        ['chromeos==0 and use_aura==1', {
           'sources!': [
-            # use_aura currently sets use_ash on Windows. So take these tests out
-            # for win aura builds.
-            # TODO: enable these for win_ash browser tests.
+            # On Windows and Linux, we currently don't support enough of the
+            # ash environment to run these unit tests.
+            #
+            # TODO: enable these on windows and linux.
             'browser/chromeos/system/tray_accessibility_browsertest.cc',
             'browser/ui/ash/accelerator_commands_browsertest.cc',
             'browser/ui/ash/launcher/chrome_launcher_controller_browsertest.cc',
@@ -1810,13 +1820,6 @@
             'browser/ui/views/frame/app_non_client_frame_view_ash_browsertest.cc',
             'browser/ui/views/frame/browser_non_client_frame_view_ash_browsertest.cc',
           ],
-        }, { # else: OS != "win"
-          'sources!': [
-            'app/chrome_command_ids.h',
-            'app/chrome_dll.rc',
-            'app/chrome_dll_resource.h',
-            'app/chrome_version.rc.version',
-          ],
         }],
         ['OS=="linux"', {
           'dependencies': [