Panels refactor: Support browserless panels on Linux.

chrome/browser/ui/panels/panel_drag_browsertest.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 "base/message_loop.h"
 #include "chrome/browser/ui/panels/base_panel_browser_test.h"
 #include "chrome/browser/ui/panels/detached_panel_strip.h"
 #include "chrome/browser/ui/panels/docked_panel_strip.h"
 #include "chrome/browser/ui/panels/native_panel.h"
 #include "chrome/browser/ui/panels/panel.h"
 #include "chrome/browser/ui/panels/panel_drag_controller.h"
 #include "chrome/browser/ui/panels/panel_manager.h"
 #include "chrome/browser/ui/panels/test_panel_mouse_watcher.h"
 
-// Refactor has only been done for Win and Mac panels so far.
-#if defined(OS_WIN) || defined(OS_MACOSX)
-
 class PanelDragBrowserTest : public BasePanelBrowserTest {
  public:
   PanelDragBrowserTest() : BasePanelBrowserTest() {
   }
 
   virtual ~PanelDragBrowserTest() {
   }
 
   virtual void SetUpOnMainThread() OVERRIDE {
     BasePanelBrowserTest::SetUpOnMainThread();
@@ skipping 1309 matching lines @@
 
   // Drag down the panel. Expect that the panel can be dragged without
   // constraint.
   drag_to_location = gfx::Point(280, 150);
   DragPanelToMouseLocation(panel, drag_to_location);
   EXPECT_EQ(PanelStrip::DETACHED, panel->panel_strip()->type());
   EXPECT_EQ(drag_to_location, panel->GetBounds().origin());
 
   panel_manager->CloseAll();
 }
-
-#endif // OS_WIN || OS_MACOSX