Remove implementation of Panels on OSes other than ChromeOS.

chrome/browser/ui/cocoa/panels/panel_utils_cocoa.h

-// 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.
-
-#ifndef CHROME_BROWSER_UI_COCOA_PANELS_PANEL_UTILS_COCOA_H_
-#define CHROME_BROWSER_UI_COCOA_PANELS_PANEL_UTILS_COCOA_H_
-
-#import <Cocoa/Cocoa.h>
-#include "ui/gfx/geometry/point.h"
-#include "ui/gfx/geometry/rect.h"
-
-namespace cocoa_utils {
-
-// TODO(dcheng): Move elsewhere so BrowserWindowCocoa can use them too.
-// Converts a rect from the platform-independent screen coordinates (with the
-// (0,0) in the top-left corner of the primary screen) to the Cocoa screen
-// coordinates (with (0,0) in the low-left corner).
-NSRect ConvertRectToCocoaCoordinates(const gfx::Rect& bounds);
-
-// Converts a rect from the Cocoa screen oordinates (with (0,0) in the low-left
-// corner) to the platform-independent screen coordinates (with the (0,0) in
-// the top-left corner of the primary screen).
-gfx::Rect ConvertRectFromCocoaCoordinates(NSRect bounds);
-
-// Converts a point from the platform-independent screen coordinates (with the
-// (0,0) in the top-left corner of the primary screen) to the Cocoa screen
-// coordinates (with (0,0) in the low-left corner).
-NSPoint ConvertPointToCocoaCoordinates(const gfx::Point& point);
-
-// Converts a point from the Cocoa screen coordinates (with (0,0) in the
-// low-left corner of the primary screen) to the platform-independent screen
-// coordinates (with the (0,0) in the top-left corner).
-gfx::Point ConvertPointFromCocoaCoordinates(NSPoint point);
-
-}  // namespace cocoa_utils
-
-#endif  // CHROME_BROWSER_UI_COCOA_PANELS_PANEL_UTILS_COCOA_H_