Sync sqlite histograms.xml suffixes with code.

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 a08a797caadefaa69ebfc2739e4bfd0fda291e82..1daabbc88dbf67d872d562805a84a3e9df575bef 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -123633,7 +123633,12 @@ from previous Chrome versions.
   <suffix name="Activity" label="Activity"/>
   <suffix name="Affiliation" label="Affiliation"/>
   <suffix name="AppCache" label="AppCache"/>
-  <suffix name="BookmarkImages" label="BookmarkImages"/>
+  <suffix name="BackgroundRequestQueue" label="BackgroundRequestQueue"/>
+  <suffix name="BookmarkImages" label="BookmarkImages">
+    <obsolete>
+      Deprecated as of 2016-1 (http://crrev.com/372327).
+    </obsolete>
+  </suffix>
   <suffix name="Cookie" label="Cookie"/>
   <suffix name="DatabaseTracker" label="DatabaseTracker"/>
   <suffix name="DomainBoundCerts" label="DomainBoundCerts"/>
@@ -123647,7 +123652,11 @@ from previous Chrome versions.
   <suffix name="Quota" label="Quota"/>
   <suffix name="Shortcuts" label="Shortcuts"/>
   <suffix name="SyncDirectory" label="SyncDirectory"/>
-  <suffix name="Text" label="Text (obsolete 7/24/13)"/>
+  <suffix name="Text" label="Text (obsolete 7/24/13)">
+    <obsolete>
+      Deprecated as of 2013-07.
+    </obsolete>
+  </suffix>
   <suffix name="Thumbnail" label="Thumbnail"/>
   <suffix name="TopSites" label="TopSites"/>
   <suffix name="Web" label="Web"/>