evict larger entries first

net/disk_cache/simple/simple_experiment.cc

Index: net/disk_cache/simple/simple_experiment.cc
diff --git a/net/disk_cache/simple/simple_experiment.cc b/net/disk_cache/simple/simple_experiment.cc
index 38ea589322f97df405f9b48bcaa349510847ce52..e33d81bb5493aece500b9ee4ec8e6160374143f0 100644
--- a/net/disk_cache/simple/simple_experiment.cc
+++ b/net/disk_cache/simple/simple_experiment.cc
@@ -15,10 +15,26 @@ namespace disk_cache {
 
 const base::Feature kSimpleSizeExperiment = {"SimpleSizeExperiment",
                                              base::FEATURE_DISABLED_BY_DEFAULT};
+const base::Feature kSimpleCacheEvictionWithSize = {
+    "SimpleCacheEvictionWithSize", base::FEATURE_DISABLED_BY_DEFAULT};
+
 const char kSizeMultiplierParam[] = "SizeMultiplier";
 
 namespace {
 
+// Updates experiment if the experiment is active.
+void CheckForEvictionWithSizeExperiment(
+    disk_cache::SimpleExperiment* experiment) {
+  if (experiment->type != disk_cache::SimpleExperimentType::NONE)
+    return;
+
+  if (base::FeatureList::GetFieldTrial(kSimpleCacheEvictionWithSize)) {
+    experiment->type = SimpleExperimentType::EVICT_WITH_SIZE;
+    experiment->param =
+        base::FeatureList::IsEnabled(kSimpleCacheEvictionWithSize) ? 1 : 0;
+  }
+}
+
 // Returns true if the experiment is found and properly defined.
 bool CheckForSimpleSizeExperiment(disk_cache::SimpleExperiment* experiment) {
   DCHECK_EQ(disk_cache::SimpleExperimentType::NONE, experiment->type);
@@ -58,6 +74,7 @@ SimpleExperiment GetSimpleExperiment(net::CacheType cache_type) {
     return experiment;
 
   CheckForSimpleSizeExperiment(&experiment);
+  CheckForEvictionWithSizeExperiment(&experiment);
   return experiment;
 }