SelectionOwner: add support for TIMESTAMP target

ui/base/dragdrop/os_exchange_data_provider_aurax11.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/base/dragdrop/os_exchange_data_provider_aurax11.h"
 
 #include "base/logging.h"
 #include "base/memory/ref_counted_memory.h"
 #include "base/strings/string_split.h"
 #include "base/strings/string_util.h"
@@ skipping 65 matching lines @@
           0,
           NULL)),
       atom_cache_(x_display_, kAtomsToCache),
       format_map_(),
       selection_owner_(x_display_, x_window_,
                        atom_cache_.GetAtom(kDndSelection)) {
   // We don't know all possible MIME types at compile time.
   atom_cache_.allow_uncached_atoms();
 
   XStoreName(x_display_, x_window_, "Chromium Drag & Drop Window");
+  XSelectInput(x_display_, x_window_, PropertyChangeMask);
 
   PlatformEventSource::GetInstance()->AddPlatformEventDispatcher(this);
 }
 
 OSExchangeDataProviderAuraX11::~OSExchangeDataProviderAuraX11() {
   if (own_window_) {
     PlatformEventSource::GetInstance()->RemovePlatformEventDispatcher(this);
     XDestroyWindow(x_display_, x_window_);
   }
 }
@@ skipping 450 matching lines @@
 
 ///////////////////////////////////////////////////////////////////////////////
 // OSExchangeData, public:
 
 // static
 OSExchangeData::Provider* OSExchangeData::CreateProvider() {
   return new OSExchangeDataProviderAuraX11();
 }
 
 }  // namespace ui