[DevTools] Remove dock side knowledge from browser.

chrome/common/pref_names.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.
 
 // Constants for the names of various preferences, for easier changing.
 
 #ifndef CHROME_COMMON_PREF_NAMES_H_
 #define CHROME_COMMON_PREF_NAMES_H_
 
 #include <stddef.h>
@@ skipping 570 matching lines @@
 extern const char kNtpPromoDesktopSessionFound[];
 extern const char kNtpPromoResourceCacheUpdate[];
 extern const char kNtpShownBookmarksFolder[];
 extern const char kNtpShownPage[];
 extern const char kNtpTipsResourceServer[];
 extern const char kNtpWebStoreEnabled[];
 
 extern const char kDevToolsAdbKey[];
 extern const char kDevToolsDisabled[];
 extern const char kDevToolsDiscoverUsbDevicesEnabled[];
-extern const char kDevToolsDockSide[];
 extern const char kDevToolsEditedFiles[];
 extern const char kDevToolsFileSystemPaths[];
 extern const char kDevToolsOpenDocked[];
 extern const char kDevToolsPortForwardingEnabled[];
 extern const char kDevToolsPortForwardingDefaultSet[];
 extern const char kDevToolsPortForwardingConfig[];
 #if defined(OS_ANDROID)
 extern const char kDevToolsRemoteEnabled[];
 #endif
 #if defined(OS_ANDROID) || defined(OS_IOS)
@@ skipping 348 matching lines @@
 #if defined(OS_WIN)
 extern const char kOsPasswordBlank[];
 extern const char kOsPasswordLastChanged[];
 #endif
 
 extern const char kQuickCheckEnabled[];
 
 }  // namespace prefs
 
 #endif  // CHROME_COMMON_PREF_NAMES_H_