content: Move gtk_expanded_container to ui/base/gtk/.

ui/ui_unittests.gypi

Index: ui/ui_unittests.gypi
diff --git a/ui/ui_unittests.gypi b/ui/ui_unittests.gypi
index 9839df616c1f3aff701b5485bc796b45699aec06..f50696790dd7f0339b7692b06a06e45bd4ddaac9 100644
--- a/ui/ui_unittests.gypi
+++ b/ui/ui_unittests.gypi
@@ -23,6 +23,7 @@
         'base/animation/multi_animation_unittest.cc',
         'base/animation/slide_animation_unittest.cc',
         'base/clipboard/clipboard_unittest.cc',
+        'base/gtk/gtk_expanded_container_unittest.cc',
         'base/gtk/gtk_im_context_util_unittest.cc',
         'base/l10n/l10n_util_mac_unittest.mm',
         'base/l10n/l10n_util_unittest.cc',
@@ -124,6 +125,11 @@
                  '../base/allocator/allocator.gyp:allocator',
                ],
             }],
+            ['toolkit_views==1', {
+              'sources!': [
+                'browser/ui/gtk/gtk_expanded_container_unittest.cc',
+              ],
+            }],
           ],
         }],
         ['toolkit_views==1', {