Remove Aero Peek Tabs code.

chrome/common/chrome_switches.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.
 
 // Defines all the command-line switches used by Chrome.
 
 #ifndef CHROME_COMMON_CHROME_SWITCHES_H_
 #define CHROME_COMMON_CHROME_SWITCHES_H_
 #pragma once
 
@@ skipping 113 matching lines @@
 extern const char kDisableTranslate[];
 extern const char kDisableWebResources[];
 extern const char kDisableZeroBrowsersOpenForTests[];
 extern const char kDiskCacheDir[];
 extern const char kDiskCacheSize[];
 extern const char kDnsLogDetails[];
 extern const char kDnsPrefetchDisable[];
 extern const char kDownloadsNewUI[];
 extern const char kDumpHistogramsOnExit[];
 extern const char kEnableActionBox[];
-extern const char kEnableAeroPeekTabs[];
 extern const char kEnableAsyncDns[];
 extern const char kEnableAsynchronousSpellChecking[];
 extern const char kEnableAuthNegotiatePort[];
 extern const char kEnableAutofillFeedback[];
 extern const char kEnableAutologin[];
 extern const char kEnableBenchmarking[];
 extern const char kEnableBrowserActionsForAll[];
 extern const char kEnableBundledPpapiFlash[];
 extern const char kEnableClientOAuthSignin[];
 extern const char kEnableChromeToMobile[];
@@ skipping 269 matching lines @@
 #else
 extern const char kEnablePrintPreview[];
 #endif
 
 // DON'T ADD RANDOM STUFF HERE. Put it in the main section above in
 // alphabetical order, or in one of the ifdefs (also in order in each section).
 
 }  // namespace switches
 
 #endif  // CHROME_COMMON_CHROME_SWITCHES_H_