Move ui/base/x/x11_error_tracker to base/x11.

base/base.gypi

Index: base/base.gypi
diff --git a/base/base.gypi b/base/base.gypi
index 8caee68d5ee911d2d5c3a0bd0163b80d053d9db9..2552fea00c9aa7fd3508abaac893bf5acb9c5103 100644
--- a/base/base.gypi
+++ b/base/base.gypi
@@ -667,6 +667,9 @@
           'win/windows_version.h',
           'win/wrapped_window_proc.cc',
           'win/wrapped_window_proc.h',
+          'x11/x11_error_tracker.cc',
+          'x11/x11_error_tracker.h',
+          'x11/x11_error_tracker_gtk.cc',
         ],
         'conditions': [
           ['google_tv==1', {
@@ -903,6 +906,15 @@
               ['exclude', '^third_party/nspr/'],
             ],
           }],
+          ['<(toolkit_uses_gtk) == 1', {
+            'sources!': [
+              'x11/x11_error_tracker.cc',
+            ],
+          }, {  # toolkit_uses_gtk!=1
+            'sources!': [
+              'x11/x11_error_tracker_gtk.cc',
+            ],
+          }],
         ],
       }],
     ],