linux_aura: Keep GTK state from leaking between profiles.

chrome/browser/ui/cocoa/bookmarks/bookmark_bar_controller_unittest.mm

Index: chrome/browser/ui/cocoa/bookmarks/bookmark_bar_controller_unittest.mm
diff --git a/chrome/browser/ui/cocoa/bookmarks/bookmark_bar_controller_unittest.mm b/chrome/browser/ui/cocoa/bookmarks/bookmark_bar_controller_unittest.mm
index f13e3065e698ea9512c322292790817c4ad73fdb..52b110a480c14bd6bf0d054a8d1d73041ef33d34 100644
--- a/chrome/browser/ui/cocoa/bookmarks/bookmark_bar_controller_unittest.mm
+++ b/chrome/browser/ui/cocoa/bookmarks/bookmark_bar_controller_unittest.mm
@@ -209,6 +209,9 @@ class FakeTheme : public ui::ThemeProvider {
   FakeTheme(NSColor* color) : color_(color) {}
   base::scoped_nsobject<NSColor> color_;
 
+  virtual bool UsingNativeTheme() const OVERRIDE {
+    return true;
+  }
   virtual gfx::ImageSkia* GetImageSkiaNamed(int id) const OVERRIDE {
     return NULL;
   }