Get drag and drop working on Win Ash.

ash/drag_drop/drag_drop_controller_unittest.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 "ash/drag_drop/drag_drop_controller.h"
 
 #include "ash/drag_drop/drag_image_view.h"
 #include "ash/shell.h"
 #include "ash/test/ash_test_base.h"
 #include "base/command_line.h"
@@ skipping 215 matching lines @@
   }
 
  private:
   bool check_if_capture_lost_;
 
   DISALLOW_COPY_AND_ASSIGN(TestNativeWidgetAura);
 };
 
 // TODO(sky): this is for debugging, remove when track down failure.
 void SetCheckIfCaptureLost(views::Widget* widget, bool value) {
+  // On Windows, the DCHECK triggers when running on bot or locally through RDP,
+  // but not when logged in locally.
+#if !defined(OS_WIN)
   static_cast<TestNativeWidgetAura*>(widget->native_widget())->
       set_check_if_capture_lost(value);
+#endif
 }
 
 views::Widget* CreateNewWidget() {
   views::Widget* widget = new views::Widget;
   views::Widget::InitParams params;
   params.type = views::Widget::InitParams::TYPE_WINDOW_FRAMELESS;
   params.accept_events = true;
   params.ownership = views::Widget::InitParams::WIDGET_OWNS_NATIVE_WIDGET;
   params.parent = Shell::GetPrimaryRootWindow();
   params.child = true;
@@ skipping 727 matching lines @@
     EXPECT_EQ("405,405", observer.window_location_on_destroying().ToString());
   }
   for (Shell::RootWindowList::iterator iter = root_windows.begin();
        iter != root_windows.end(); ++iter) {
     aura::client::SetDragDropClient(*iter, NULL);
   }
 }
 
 }  // namespace test
 }  // namespace aura