Revert of Change how the quota system computes the total poolsize for temporary storage

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 bc086e693b95ff6d0e20ac3857c051ddaa80dc9b..8e2521c2296c68cba1e4916e0d0c17e786df56c4 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -51411,16 +51411,6 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   <summary>Number of unlimited origins using temporary storage.</summary>
 </histogram>
 
-<histogram name="Quota.OSAccomodationDelta" units="MB">
-  <owner>michaeln@chromium.org</owner>
-  <summary>
-    If our hardcoded OS accomodation is too large for the volume size, we define
-    the value as a fraction of the total volume size instead. The
-    OSAccomodationDelta is the difference between the hardcoded and computed
-    values.
-  </summary>
-</histogram>
-
 <histogram name="Quota.QuotaForOrigin" units="MB">
   <owner>michaeln@chromium.org</owner>
   <summary>
@@ -51456,18 +51446,7 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   <summary>Time spent to an eviction round.</summary>
 </histogram>
 
-<histogram name="Quota.TimeToGetSettings" units="ms">
-  <owner>michaeln@chromium.org</owner>
-  <summary>
-    Time spent querying the embedder for the settings values. Logged at
-    irregular intervals as the values are refreshed.
-  </summary>
-</histogram>
-
 <histogram name="Quota.TimeToInitializeGlobalQuota" units="ms">
-  <obsolete>
-    Removed November 2016
-  </obsolete>
   <owner>michaeln@chromium.org</owner>
   <summary>
     Time spent initializing the global quota. Logged when the storage