SelectionOwner: add support for TIMESTAMP target

components/bookmarks/browser/bookmark_utils_unittest.cc

Index: components/bookmarks/browser/bookmark_utils_unittest.cc
diff --git a/components/bookmarks/browser/bookmark_utils_unittest.cc b/components/bookmarks/browser/bookmark_utils_unittest.cc
index f27676d8041dc392f055f221c33729b30bff869e..c37b16a35993cd980ab77e4a9f771821cec22463 100644
--- a/components/bookmarks/browser/bookmark_utils_unittest.cc
+++ b/components/bookmarks/browser/bookmark_utils_unittest.cc
@@ -20,6 +20,15 @@
 #include "ui/base/clipboard/clipboard.h"
 #include "ui/base/clipboard/scoped_clipboard_writer.h"
 
+#if defined(USE_GLIB) && defined(USE_X11)
+
+#include <memory>
+
+#include "ui/events/platform/x11/x11_event_source_glib.h"  // nogncheck
+#include "ui/gfx/x/x11_types.h"                            // nogncheck
+
+#endif  // defined(USE_GLIB) && defined(USE_X11)
+
 using base::ASCIIToUTF16;
 using std::string;
 
@@ -30,8 +39,12 @@ class BookmarkUtilsTest : public testing::Test,
                           public BaseBookmarkModelObserver {
  public:
   BookmarkUtilsTest()
-      : grouped_changes_beginning_count_(0),
-        grouped_changes_ended_count_(0) {}
+      : grouped_changes_beginning_count_(0), grouped_changes_ended_count_(0) {
+#if defined(USE_GLIB) && defined(USE_X11)
+    event_source_.reset(new ui::X11EventSourceGlib(gfx::GetXDisplay()));
+#endif  // defined(USE_GLIB) && defined(USE_X11)
+  }
+
   ~BookmarkUtilsTest() override {}
 
 // Copy and paste is not yet supported on iOS. http://crbug.com/228147
@@ -73,6 +86,11 @@ class BookmarkUtilsTest : public testing::Test,
 
   // Clipboard requires a message loop.
   base::MessageLoopForUI loop_;
+#if defined(USE_GLIB) && defined(USE_X11)
+  // On Linux, Clipboard also depends on an event source being present, to get
+  // the timestamp.
+  std::unique_ptr<ui::X11EventSourceGlib> event_source_;
+#endif  // defined(USE_GLIB) && defined(USE_X11)
 
   DISALLOW_COPY_AND_ASSIGN(BookmarkUtilsTest);
 };