Add enable-offlining-recent-pages feature switch.

tools/metrics/histograms/histograms.xml

Index: tools/metrics/histograms/histograms.xml
diff --git a/tools/metrics/histograms/histograms.xml b/tools/metrics/histograms/histograms.xml
index f47f6a8feb182b10fc6e905ee83ae5c6efb3dd5c..1241a8d13fa4f07d34a2d870eebafb138aeb9d5c 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -71919,6 +71919,7 @@ To add a new entry, add it with any value and run test to compute valid value.
   <int value="-899334103" label="disable-fast-text-autosizing"/>
   <int value="-898594349" label="ash-enable-stable-overview-order"/>
   <int value="-898005938" label="disable-pinch-virtual-viewport"/>
+  <int value="-897524465" label="enable-offlining-recent-pages"/>
   <int value="-885601782" label="enable-contextual-search"/>
   <int value="-867087281" label="enable-virtual-keyboard"/>
   <int value="-864266073" label="cros-regions-mode"/>
@@ -71994,6 +71995,7 @@ To add a new entry, add it with any value and run test to compute valid value.
   <int value="-314910380" label="disable-distance-field-text"/>
   <int value="-311148335" label="v8-pac-mojo-out-of-process"/>
   <int value="-300018686" label="disable-cloud-import"/>
+  <int value="-292362595" label="disable-offlining-recent-pages"/>
   <int value="-288316828" label="enable-delegated-renderer"/>
   <int value="-278347667" label="default-tile-height"/>
   <int value="-277144896" label="enable-viewport-meta"/>