Enable tab discarding on Mac (behind a flag).

chrome/common/chrome_switches.cc

 // 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/common/chrome_switches.h"
 
 #include "base/base_switches.h"
 #include "base/command_line.h"
 
 namespace switches {
@@ skipping 1276 matching lines @@
 const char kEnablePermissionsBubbles[]      = "enable-permissions-bubbles";
 
 #if defined(OS_WIN)
 // Fallback to XPS. By default connector uses CDD.
 const char kEnableCloudPrintXps[]           = "enable-cloud-print-xps";
 
 // Force-enables the profile shortcut manager. This is needed for tests since
 // they use a custom-user-data-dir which disables this.
 const char kEnableProfileShortcutManager[]  = "enable-profile-shortcut-manager";
 
-// Enable tab discarding when system is under memory pressure.
-const char kEnableTabDiscarding[] = "enable-tab-discarding";
-
 // For the DelegateExecute verb handler to launch Chrome in metro mode on
 // Windows 8 and higher.  Used when relaunching metro Chrome.
 const char kForceImmersive[]                = "force-immersive";
 
 // Whether or not the browser should warn if the profile is on a network share.
 // This flag is only relevant for Windows currently.
 const char kNoNetworkProfileWarning[]       = "no-network-profile-warning";
 
 // For the DelegateExecute verb handler to launch Chrome in desktop mode on
 // Windows 8 and higher.  Used when relaunching metro Chrome.
@@ skipping 20 matching lines @@
 const char kViewerLaunchViaAppId[]          = "viewer-launch-via-appid";
 
 // Waits for the given handle to be signaled before relaunching metro Chrome on
 // Windows 8 and higher.
 const char kWaitForMutex[]                  = "wait-for-mutex";
 
 // Indicates that chrome was launched to service a search request in Windows 8.
 const char kWindows8Search[]                = "windows8-search";
 #endif  // defined(OS_WIN)
 
+#if defined(OS_WIN) || defined(OS_MACOSX)
+// Enable tab discarding when system is under memory pressure.
+const char kEnableTabDiscarding[] = "enable-tab-discarding";
+#endif  // defined(OS_WIN) || defined(OS_MACOSX)
+
 #if defined(ENABLE_IPC_FUZZER)
 // Specifies the testcase used by the IPC fuzzer.
 const char kIpcFuzzerTestcase[]             = "ipc-fuzzer-testcase";
 #endif
 
 #if defined(ENABLE_PRINT_PREVIEW) && !defined(OFFICIAL_BUILD)
 // Enables support to debug printing subsystem.
 const char kDebugPrint[] = "debug-print";
 #endif
 
@@ skipping 60 matching lines @@
 
 // -----------------------------------------------------------------------------
 // DO NOT ADD YOUR CRAP TO THE BOTTOM OF THIS FILE.
 //
 // You were going to just dump your switches here, weren't you? Instead, please
 // put them in alphabetical order above, or in order inside the appropriate
 // ifdef at the bottom. The order should match the header.
 // -----------------------------------------------------------------------------
 
 }  // namespace switches