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

chromeos/chromeos_switches.cc

Index: chromeos/chromeos_switches.cc
diff --git a/chromeos/chromeos_switches.cc b/chromeos/chromeos_switches.cc
index 6ac7d2e345844d6598483c3b419c99e3294e5d26..d297ec54877936d759f0f54bc74acea949026656 100644
--- a/chromeos/chromeos_switches.cc
+++ b/chromeos/chromeos_switches.cc
@@ -224,6 +224,12 @@ 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";
@@ -311,28 +317,5 @@ 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