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..0587aed4162a9d86b4f3fbdbb549a091f647ade2 100644
--- a/components/bookmarks/browser/bookmark_utils_unittest.cc
+++ b/components/bookmarks/browser/bookmark_utils_unittest.cc
@@ -20,6 +20,11 @@
 #include "ui/base/clipboard/clipboard.h"
 #include "ui/base/clipboard/scoped_clipboard_writer.h"
 
+#if defined(USE_X11)
+#include "ui/events/platform/x11/x11_event_source_glib.h"
+#include "ui/gfx/x/x11_types.h"
+#endif  // defined(USE_X11)
+
 using base::ASCIIToUTF16;
 using std::string;
 
@@ -31,7 +36,14 @@ class BookmarkUtilsTest : public testing::Test,
  public:
   BookmarkUtilsTest()
       : grouped_changes_beginning_count_(0),
-        grouped_changes_ended_count_(0) {}
+#if defined(USE_X11)
+        grouped_changes_ended_count_(0),
+        event_source_(gfx::GetXDisplay()) {
+  }
+#else
+        grouped_changes_ended_count_(0) {
+  }
+#endif  // defined(USE_x11)
   ~BookmarkUtilsTest() override {}
 
 // Copy and paste is not yet supported on iOS. http://crbug.com/228147
@@ -73,6 +85,11 @@ class BookmarkUtilsTest : public testing::Test,
 
   // Clipboard requires a message loop.
   base::MessageLoopForUI loop_;
+#if defined(USE_X11)
+  // On Linux, Clipboard also depends on an event source being present, to get
+  // the timestamp.
+  ui::X11EventSourceGlib event_source_;

[dcheng, 2016/04/20 00:55:26]

I'm pretty sure the existing bookmark clipboard tests are flaky. See
https://crbug.com/396472 for instance.

+#endif  // defined(USE_X11)
 
   DISALLOW_COPY_AND_ASSIGN(BookmarkUtilsTest);
 };