Remove implementation of Panels on OSes other than ChromeOS.

chrome/browser/ui/panels/detached_panel_drag_handler.cc

Index: chrome/browser/ui/panels/detached_panel_drag_handler.cc
diff --git a/chrome/browser/ui/panels/detached_panel_drag_handler.cc b/chrome/browser/ui/panels/detached_panel_drag_handler.cc
deleted file mode 100644
index 2f3004af7264cb70b4eca6423444addca643c967..0000000000000000000000000000000000000000
--- a/chrome/browser/ui/panels/detached_panel_drag_handler.cc
+++ /dev/null
@@ -1,21 +0,0 @@
-// 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 "chrome/browser/ui/panels/detached_panel_drag_handler.h"
-
-#include "base/logging.h"
-#include "chrome/browser/ui/panels/panel.h"
-#include "chrome/browser/ui/panels/panel_collection.h"
-#include "ui/gfx/geometry/point.h"
-#include "ui/gfx/geometry/rect.h"
-
-// static
-void DetachedPanelDragHandler::HandleDrag(Panel* panel,
-                                          const gfx::Point& target_position) {
-  DCHECK_EQ(PanelCollection::DETACHED, panel->collection()->type());
-
-  gfx::Rect new_bounds(panel->GetBounds());
-  new_bounds.set_origin(target_position);
-  panel->SetPanelBoundsInstantly(new_bounds);
-}