Add a finch experiment for different memory pressure management strategies in ChromeOS.

chromeos/chromeos_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 "chromeos/chromeos_switches.h"
 
 #include "base/command_line.h"
 
 // TODO(rsorokin): alphabetize all of these switches so they
 // match the order from the .h file
@@ skipping 206 matching lines @@
 // In case of browser restart within active session this parameter is used
 // to pass user_id hash for primary user.
 const char kLoginProfile[] = "login-profile";
 
 // Specifies the user which is already logged in.
 const char kLoginUser[] = "login-user";
 
 // The memory pressure thresholds selection which is used to decide when a
 // memory pressure event needs to get fired.
 const char kMemoryPressureThresholds[] = "memory-pressure-thresholds";
+const char kConservativeThreshold[] = "conservative-threshold";
+const char kAggressiveCacheDiscardThreshold[] =
+    "aggressive-cache-discard-threshold";
+const char kAggressiveTabDiscardThreshold[] =
+    "aggressive-tab-discard-threshold";
+const char kAggressiveThreshold[] = "aggressive-threshold";
 
 // Enables natural scroll by default.
 const char kNaturalScrollDefault[] = "enable-natural-scroll-default";
 
 // Skips all other OOBE pages after user login.
 const char kOobeSkipPostLogin[] = "oobe-skip-postlogin";
 
 // Disable GAIA services such as enrollment and OAuth session restore. Used by
 // 'fake' telemetry login.
 const char kDisableGaiaServices[] = "disable-gaia-services";
@@ skipping 67 matching lines @@
 const char kEnableCaptivePortalBypassProxy[] =
     "enable-captive-portal-bypass-proxy";
 
 // Enable automatic timezone update.
 const char kEnableTimeZoneTrackingOption[] = "enable-timezone-tracking-option";
 
 bool WakeOnWifiEnabled() {
   return !base::CommandLine::ForCurrentProcess()->HasSwitch(kDisableWakeOnWifi);
 }
 
-base::MemoryPressureObserverChromeOS::MemoryPressureThresholds
-GetMemoryPressureThresholds() {
-  if (!base::CommandLine::ForCurrentProcess()->HasSwitch(
-          kMemoryPressureThresholds)) {
-    return base::MemoryPressureObserverChromeOS::THRESHOLD_DEFAULT;
-  }
-  const std::string option =
-      base::CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
-          kMemoryPressureThresholds);
-  if (option == "1") {
-    return base::MemoryPressureObserverChromeOS::THRESHOLD_CONSERVATIVE;
-  }
-  if (option == "2") {
-    return base::MemoryPressureObserverChromeOS::
-        THRESHOLD_AGGRESSIVE_CACHE_DISCARD;
-  }
-  if (option == "3") {
-    return base::MemoryPressureObserverChromeOS::
-        THRESHOLD_AGGRESSIVE_TAB_DISCARD;
-  }
-  return base::MemoryPressureObserverChromeOS::THRESHOLD_AGGRESSIVE;
-}
-
 }  // namespace switches
 }  // namespace chromeos