Mark two SafeBrowsingBinaryUploadRequest metrics obsolete

The metrics:
SafeBrowsingBinaryUploadRequest.AdvancedProtectionScanVerdict
and SafeBrowsingBinaryUploadRequest.MalwareScanVerdict had
already been stopped being logged in
https://crrev.com/c/2505943, so mark them obsolete and document
the replacements.

Fixed: 1153857
Change-Id: I9d732bdcebaffe312063dd749ebb69873f6fe12d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2577601
Commit-Queue: Daniel Rubery <drubery@chromium.org>
Commit-Queue: Steven Holte <holte@chromium.org>
Auto-Submit: Daniel Rubery <drubery@chromium.org>
Reviewed-by: Steven Holte <holte@chromium.org>
Cr-Commit-Position: refs/heads/master@{#834324}

tools/metrics/histograms/histograms_xml/safe_browsing/histograms.xml

@@ -1495,6 +1495,10 @@ failing to fetch the updates which puts users' security at risk. -->
 
 <histogram name="SafeBrowsingBinaryUploadRequest.AdvancedProtectionScanVerdict"
     enum="SafeBrowsingMalwareDeepScanningVerdict" expires_after="2021-01-14">
+  <obsolete>
+    Marked obsolete 12-2020. Replaced by
+    SBClientDownload.MalwareDeepScanResult.AdvancedProtectionPrompt.
+  </obsolete>
   <owner>drubery@chromium.org</owner>
   <owner>chrome-safebrowsing-alerts@google.com</owner>
   <summary>
@@ -1540,6 +1544,9 @@ failing to fetch the updates which puts users' security at risk. -->
 
 <histogram name="SafeBrowsingBinaryUploadRequest.MalwareScanVerdict"
     enum="SafeBrowsingMalwareDeepScanningVerdict" expires_after="2021-01-14">
+  <obsolete>
+    Removed 12-2020. Replaced by SafeBrowsingBinaryUploadRequest.MalwareResult.
+  </obsolete>
   <owner>drubery@chromium.org</owner>
   <owner>chrome-safebrowsing-alerts@google.com</owner>
   <summary>