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

chrome/browser/about_flags.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/browser/about_flags.h"
 
 #include <iterator>
 #include <map>
 #include <set>
 #include <utility>
@@ skipping 278 matching lines @@
   { IDS_GENERIC_EXPERIMENT_CHOICE_ENABLED,
     switches::kEnableGpuRasterization, "" },
   { IDS_GENERIC_EXPERIMENT_CHOICE_DISABLED,
     switches::kDisableGpuRasterization, "" },
   { IDS_FLAGS_FORCE_GPU_RASTERIZATION,
     switches::kForceGpuRasterization, "" },
 };
 
 #if defined(OS_CHROMEOS)
 const Experiment::Choice kMemoryPressureThresholdChoices[] = {
-  { IDS_GENERIC_EXPERIMENT_CHOICE_DEFAULT, "", "" },
-  { IDS_FLAGS_CONSERVATIVE_THRESHOLDS,
-    chromeos::switches::kMemoryPressureThresholds, "1" },
-  { IDS_FLAGS_AGGRESSIVE_CACHE_DISCARD_THRESHOLDS,
-    chromeos::switches::kMemoryPressureThresholds, "2" },
-  { IDS_FLAGS_AGGRESSIVE_TAB_DISCARD_THRESHOLDS,
-    chromeos::switches::kMemoryPressureThresholds, "3" },
-  { IDS_FLAGS_AGGRESSIVE_THRESHOLDS,
-    chromeos::switches::kMemoryPressureThresholds, "4" },
+    { IDS_GENERIC_EXPERIMENT_CHOICE_DEFAULT, "", "" },
+    { IDS_FLAGS_CONSERVATIVE_THRESHOLDS,
+      chromeos::switches::kMemoryPressureThresholds,
+      kConservativeThreshold },
+    { IDS_FLAGS_AGGRESSIVE_CACHE_DISCARD_THRESHOLDS,
+      chromeos::switches::kMemoryPressureThresholds,
+      kAggressiveCacheDiscardThreshold },
+    { IDS_FLAGS_AGGRESSIVE_TAB_DISCARD_THRESHOLDS,
+      chromeos::switches::kMemoryPressureThresholds,
+      kAggressiveTabDiscardThreshold },
+    { IDS_FLAGS_AGGRESSIVE_THRESHOLDS,
+      chromeos::switches::kMemoryPressureThresholds,
+      kAggressiveThreshold },
 };
 #endif
 
 // We're using independent flags here (as opposed to a common flag with
 // different values) to be able to enable/disable the entire experience
 // associated with this feature server-side from the FieldTrial (the complete
 // experience includes other flag changes as well). It is not currently possible
 // to do that with "flag=value" flags.
 const Experiment::Choice kSearchButtonInOmniboxChoices[] = {
   { IDS_GENERIC_EXPERIMENT_CHOICE_DEFAULT, "", "" },
@@ skipping 2421 matching lines @@
 }
 
 const Experiment* GetExperiments(size_t* count) {
   *count = num_experiments;
   return experiments;
 }
 
 }  // namespace testing
 
 }  // namespace about_flags