[Downloads] Deprecate incorrect metrics.

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 efdd7bdbb67a2f4d5c08644f307222fc509ef450..098ab17834cff0ba4e39bea53f180b5ea4ce91bf 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -11921,6 +11921,9 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
 </histogram>
 
 <histogram name="Download.ActualBandwidth" units="Bytes/second">
+  <obsolete>
+    Deprecated January 2017.
+  </obsolete>
   <owner>asanka@chromium.org</owner>
   <summary>The actual bandwidth (per read) of a download.</summary>
 </histogram>
@@ -11966,6 +11969,9 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
 </histogram>
 
 <histogram name="Download.BandwidthUsed" units="%">
+  <obsolete>
+    Deprecated January 2017.
+  </obsolete>
   <owner>asanka@chromium.org</owner>
   <summary>
     The percentage of the potential bandwidth actually used (per read) of a
@@ -12119,6 +12125,9 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
 </histogram>
 
 <histogram name="Download.DiskBandwidthUsedPercentage" units="%">
+  <obsolete>
+    Deprecated 1/2017.
+  </obsolete>
   <owner>asanka@chromium.org</owner>
   <summary>
     The percentage of the available disk bandwidth that was used by the
@@ -12242,10 +12251,10 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
 <histogram name="Download.InterruptedOverrunBytes">
   <owner>asanka@chromium.org</owner>
   <summary>
-    The excessive number of bytes which have been received at the time that a
-    download is interrupted. This is only triggered when the total content size
-    is known before any bytes are transferred, such as when a Content-Length
-    header is supplied.
+    The total number of bytes minus the received number of bytes at the time
+    that a download is interrupted. This is only triggered when the total
+    content size is known before any bytes are transferred, such as when a
+    Content-Length header is supplied.
   </summary>
 </histogram>
 
@@ -12276,10 +12285,10 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
 <histogram name="Download.InterruptedUnderrunBytes">
   <owner>asanka@chromium.org</owner>
   <summary>
-    The total number of bytes minus the received number of bytes at the time
-    that a download is interrupted. This is only triggered when the total
-    content size is known before any bytes are transferred, such as when a
-    Content-Length header is supplied.
+    The excessive number of bytes which have been received at the time that a
+    download is interrupted. This is only triggered when the total content size
+    is known before any bytes are transferred, such as when a Content-Length
+    header is supplied.
   </summary>
 </histogram>
 
@@ -12395,6 +12404,9 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
 </histogram>
 
 <histogram name="Download.PotentialBandwidth" units="Bytes/second">
+  <obsolete>
+    Deprecated January 2017.
+  </obsolete>
   <owner>asanka@chromium.org</owner>
   <summary>
     The maximum bandwidth (per read) that Chrome could have provided for the
@@ -12524,6 +12536,9 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
 </histogram>
 
 <histogram name="Download.WriteLoopCount">
+  <obsolete>
+    Deprecated 1/2017
+  </obsolete>
   <owner>asanka@chromium.org</owner>
   <summary>
     The number of iterations for the write loop in BaseFile::AppendDataTofile().
@@ -12531,6 +12546,9 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
 </histogram>
 
 <histogram name="Download.WriteSize" units="Bytes">
+  <obsolete>
+    Deprecated 1/2017
+  </obsolete>
   <owner>asanka@chromium.org</owner>
   <summary>The write size for calls to BaseFile::AppendDataTofile().</summary>
 </histogram>
@@ -54774,6 +54792,11 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
 </histogram>
 
 <histogram name="SB2.DownloadDuration" units="ms">
+  <obsolete>
+    Deprecated 01/2017. Was measuring the lifetime of a network request
+    corresponding to a download, which may or may not correspond to the total
+    duration of a download.
+  </obsolete>
   <owner>shess@chromium.org</owner>
   <summary>The time it takes for a download to finish.</summary>
 </histogram>