Refresh FetchLater/FetchKeepAlive histograms

They are still in used.

Bug: 40236167, 1465781
Change-Id: I2fe2a08a1e72d4a55d518e36f115a99bd5ee9eaf
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5619673
Commit-Queue: Ming-Ying Chung <mych@chromium.org>
Reviewed-by: Tony Yeoman <tby@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1313238}

tools/metrics/histograms/metadata/others/histograms.xml

@@ -5850,7 +5850,7 @@ chromium-metrics-reviews@google.com.
 </histogram>
 
 <histogram name="FetchKeepAlive.RequestDuration{RequestState}" units="ms"
-    expires_after="2024-06-07">
+    expires_after="2024-12-12">
   <owner>mych@chromium.org</owner>
   <owner>chrome-bfcache@google.com</owner>
   <summary>
@@ -5878,7 +5878,7 @@ chromium-metrics-reviews@google.com.
 </histogram>
 
 <histogram name="FetchKeepAlive.RequestOutliveDuration" units="ms"
-    expires_after="2024-11-24">
+    expires_after="2024-12-12">
   <owner>mych@chromium.org</owner>
   <owner>chrome-bfcache@google.com</owner>
   <summary>
@@ -5896,7 +5896,7 @@ chromium-metrics-reviews@google.com.
 </histogram>
 
 <histogram name="FetchKeepAlive.Requests2.{RequestState}.{Process}"
-    enum="FetchKeepAliveRequestMetricType" expires_after="2024-09-22">
+    enum="FetchKeepAliveRequestMetricType" expires_after="2024-12-12">
   <owner>mych@chromium.org</owner>
   <owner>chrome-bfcache@google.com</owner>
   <summary>
@@ -5927,7 +5927,7 @@ chromium-metrics-reviews@google.com.
 </histogram>
 
 <histogram name="FetchLater.Browser.Metrics" enum="FetchLaterBrowserMetricType"
-    expires_after="2024-07-10">
+    expires_after="2024-12-12">
   <owner>mych@chromium.org</owner>
   <owner>chrome-bfcache@google.com</owner>
   <summary>
@@ -5937,7 +5937,7 @@ chromium-metrics-reviews@google.com.
 </histogram>
 
 <histogram name="FetchLater.Browser.Total{LoaderStatus}" enum="Boolean"
-    expires_after="2024-09-22">
+    expires_after="2024-12-12">
   <owner>mych@chromium.org</owner>
   <owner>chrome-bfcache@google.com</owner>
   <summary>Records true every time {LoaderStatus}</summary>
@@ -5959,7 +5959,7 @@ chromium-metrics-reviews@google.com.
 </histogram>
 
 <histogram name="FetchLater.Renderer.Metrics"
-    enum="FetchLaterRendererMetricType" expires_after="2024-07-10">
+    enum="FetchLaterRendererMetricType" expires_after="2024-12-12">
   <owner>mych@chromium.org</owner>
   <owner>chrome-bfcache@google.com</owner>
   <summary>
@@ -5969,7 +5969,7 @@ chromium-metrics-reviews@google.com.
 </histogram>
 
 <histogram name="FetchLater.Renderer.Total" enum="Boolean"
-    expires_after="2024-09-22">
+    expires_after="2024-12-12">
   <owner>mych@chromium.org</owner>
   <owner>chrome-bfcache@google.com</owner>
   <summary>