AutoDiscardable property support on Chrome Extensions Tabs API.

chrome/browser/extensions/api/tabs/tabs_constants.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 used for the Tabs API and the Windows API.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_API_TABS_TABS_CONSTANTS_H_
 #define CHROME_BROWSER_EXTENSIONS_API_TABS_TABS_CONSTANTS_H_
 
 namespace extensions {
@@ skipping 19 matching lines @@
 extern const char kLastFocusedWindowKey[];
 extern const char kLeftKey[];
 extern const char kNewPositionKey[];
 extern const char kNewWindowIdKey[];
 extern const char kOldPositionKey[];
 extern const char kOldWindowIdKey[];
 extern const char kOpenerTabIdKey[];
 extern const char kPinnedKey[];
 extern const char kAudibleKey[];
 extern const char kDiscardedKey[];
+extern const char kAutoDiscardableKey[];
 extern const char kMutedKey[];
 extern const char kMutedInfoKey[];
 extern const char kQualityKey[];
 extern const char kRunAtKey[];
 extern const char kSelectedKey[];
 extern const char kShowStateKey[];
 extern const char kStatusKey[];
 extern const char kTabIdKey[];
 extern const char kTabIdsKey[];
 extern const char kTabsKey[];
@@ skipping 52 matching lines @@
 extern const char kScreenshotsDisabled[];
 extern const char kCannotUpdateMuteDisabled[];
 extern const char kCannotUpdateMuteCaptured[];
 
 extern const char kCannotDetermineLanguageOfUnloadedTab[];
 
 };  // namespace tabs_constants
 };  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_TABS_TABS_CONSTANTS_H_