Add oom tab killing and the about:discards page on linux

chrome/common/chrome_switches.cc

Index: chrome/common/chrome_switches.cc
diff --git a/chrome/common/chrome_switches.cc b/chrome/common/chrome_switches.cc
index 9e2406ecd96f1741cb32adbe50b0a8fda001cc31..9b6e5debfcf0c97cfd5bd73d2e8717269e8b82c5 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -1286,6 +1286,11 @@ const char kRelauncherProcess[]             = "relauncher";
 // Use bubbles for content permissions requests instead of infobars.
 const char kEnablePermissionsBubbles[]      = "enable-permissions-bubbles";
 
+#if defined(OS_WIN) || defined(OS_LINUX)
+// Enable tab discarding when system is under memory pressure.
+const char kEnableTabDiscarding[] = "enable-tab-discarding";
+#endif
+
 #if defined(OS_WIN)
 // Fallback to XPS. By default connector uses CDD.
 const char kEnableCloudPrintXps[]           = "enable-cloud-print-xps";
@@ -1294,9 +1299,6 @@ const char kEnableCloudPrintXps[]           = "enable-cloud-print-xps";
 // 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";