Update histogram names to follow the usual PVer4 format: SafeBrowsing.V4*

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 93ea14f12ed4a018cc65c2f10994b2c3a7290c46..8f66fc1174e34944f9d3a6c71be7238675e458b7 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -51763,6 +51763,9 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
 
 <histogram name="SafeBrowsing.GetV4HashHttpResponseOrErrorCode"
     enum="CombinedHttpResponseAndNetErrorCode">
+  <obsolete>
+    Replaced by SafeBrowsing.V4GetHash.Network.Result.
+  </obsolete>
   <owner>kcarattini@google.com</owner>
   <summary>
     Response or error codes from the SafeBrowsing Pver4 service. Logged after a
@@ -51772,6 +51775,9 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
 </histogram>
 
 <histogram name="SafeBrowsing.GetV4HashNetwork" units="ms">
+  <obsolete>
+    Replaced by SafeBrowsing.V4GetHash.Network.Time.
+  </obsolete>
   <owner>kcarattini@chromium.org</owner>
   <summary>
     The time that it took to receive a response from the Safe Browsing servers
@@ -51781,6 +51787,9 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
 
 <histogram name="SafeBrowsing.GetV4HashResult"
     enum="SafeBrowsingV4OperationResult">
+  <obsolete>
+    Replaced by SafeBrowsing.V4GetHash.Result.
+  </obsolete>
   <owner>kcarattini@chromium.org</owner>
   <summary>
     Track return status from V4 GetHash attempts. The buckets of this histogram
@@ -51799,6 +51808,9 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
 
 <histogram name="SafeBrowsing.ParseV4HashResult"
     enum="SafeBrowsingParseV4HashResult">
+  <obsolete>
+    Replaced by SafeBrowsing.V4GetHash.Parse.Result.
+  </obsolete>
   <owner>kcarattini@chromium.org</owner>
   <summary>
     Track the parsing results of a status 200 GetV4Hash request.
@@ -51807,6 +51819,9 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
 
 <histogram name="SafeBrowsing.ParseV4UpdateResult"
     enum="SafeBrowsingParseV4UpdateResult">
+  <obsolete>
+    Replaced by SafeBrowsing.V4Update.Parse.Result.
+  </obsolete>
   <owner>vakh@chromium.org</owner>
   <summary>
     Track the parsing results of a status 200 GetV4Update request.
@@ -51989,19 +52004,81 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
 
 <histogram name="SafeBrowsing.V4FullHashCacheResult"
     enum="SafeBrowsingV4FullHashCacheResult">
+  <obsolete>
+    Replaced by SafeBrowsing.V4GetHash.CacheHit.Result.
+  </obsolete>
   <owner>kcarattini@chromium.org</owner>
   <owner>vakh@chromium.org</owner>
   <summary>Track cache hits for V4 full hashes.</summary>
 </histogram>
 
+<histogram name="SafeBrowsing.V4GetHash.CacheHit.Result"
+    enum="SafeBrowsingV4FullHashCacheResult">
+  <owner>kcarattini@chromium.org</owner>
+  <owner>vakh@chromium.org</owner>
+  <summary>Track cache hits for V4 full hashes.</summary>
+</histogram>
+
+<histogram name="SafeBrowsing.V4GetHash.Check.Result"
+    enum="SafeBrowsingV4GetHashCheckResult">
+  <owner>kcarattini@chromium.org</owner>
+  <owner>vakh@chromium.org</owner>
+  <summary>Track get hash response hits for V4 full hash requests.</summary>
+</histogram>
+
+<histogram name="SafeBrowsing.V4GetHash.Network.Result"
+    enum="CombinedHttpResponseAndNetErrorCode">
+  <owner>kcarattini@google.com</owner>
+  <owner>vakh@google.com</owner>
+  <summary>
+    Response or error codes from the SafeBrowsing Pver4 service. Logged after a
+    GetHash or request finishes to capture the response code or error code for
+    that call.
+  </summary>
+</histogram>
+
+<histogram name="SafeBrowsing.V4GetHash.Network.Time" units="ms">
+  <owner>kcarattini@chromium.org</owner>
+  <owner>vakh@chromium.org</owner>
+  <summary>
+    The time that it took to receive a response from the Google SafeBrowsing
+    servers for a full hash request.
+  </summary>
+</histogram>
+
+<histogram name="SafeBrowsing.V4GetHash.Parse.Result"
+    enum="SafeBrowsingParseV4HashResult">
+  <owner>kcarattini@chromium.org</owner>
+  <owner>vakh@chromium.org</owner>
+  <summary>
+    Track the parsing results of a status 200 GetV4Hash request.
+  </summary>
+</histogram>
+
+<histogram name="SafeBrowsing.V4GetHash.Result"
+    enum="SafeBrowsingV4OperationResult">
+  <owner>kcarattini@chromium.org</owner>
+  <owner>vakh@chromium.org</owner>
+  <summary>
+    Track return status from V4 GetHash attempts. The buckets of this histogram
+    overlap, so the counts cannot be used as percentages.
+  </summary>
+</histogram>
+
 <histogram name="SafeBrowsing.V4GetHashCheckResult"
     enum="SafeBrowsingV4GetHashCheckResult">
+  <obsolete>
+    Replaced by SafeBrowsing.V4GetHash.Check.Result.
+  </obsolete>
   <owner>kcarattini@chromium.org</owner>
   <owner>vakh@chromium.org</owner>
   <summary>Track get hash response hits for V4 full hash requests.</summary>
 </histogram>
 
 <histogram name="SafeBrowsing.V4GetHashNetwork.Time" units="ms">
+  <obsolete>
+    Replaced by SafeBrowsing.V4GetHash.Network.Time.
+  </obsolete>
   <owner>vakh@chromium.org</owner>
   <summary>
     The time that it took to receive a response from the Google SafeBrowsing
@@ -52286,8 +52363,44 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="SafeBrowsing.V4Update.Network.Result"
+    enum="CombinedHttpResponseAndNetErrorCode">
+  <owner>vakh@chromium.org</owner>
+  <summary>
+    Response or error codes when fetching updates from the SafeBrowsing PVer4
+    service.
+  </summary>
+</histogram>
+
+<histogram name="SafeBrowsing.V4Update.Parse.Result"
+    enum="SafeBrowsingParseV4UpdateResult">
+  <owner>vakh@chromium.org</owner>
+  <summary>
+    Track the parsing results of a status 200 GetV4Update request.
+  </summary>
+</histogram>
+
+<histogram name="SafeBrowsing.V4Update.ResponseSizeKB" units="KB">
+  <owner>vakh@chromium.org</owner>
+  <summary>
+    The size of the response sent by the SafeBrowsing PVer4 service, in KB.
+  </summary>
+</histogram>
+
+<histogram name="SafeBrowsing.V4Update.Result"
+    enum="SafeBrowsingV4OperationResult">
+  <owner>vakh@chromium.org</owner>
+  <summary>
+    Track return status from V4 update attempts. The buckets of this histogram
+    overlap, so the counts cannot be used as percentages.
+  </summary>
+</histogram>
+
 <histogram name="SafeBrowsing.V4UpdateHttpResponseOrErrorCode"
     enum="CombinedHttpResponseAndNetErrorCode">
+  <obsolete>
+    Replaced by SafeBrowsing.V4Update.Network.Result.
+  </obsolete>
   <owner>vakh@chromium.org</owner>
   <summary>
     Response or error codes when fetching updates from the SafeBrowsing PVer4
@@ -52296,6 +52409,9 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
 </histogram>
 
 <histogram name="SafeBrowsing.V4UpdateResponseSizeKB" units="KB">
+  <obsolete>
+    Replaced by SafeBrowsing.V4Update.ResponseSizeKB.
+  </obsolete>
   <owner>vakh@chromium.org</owner>
   <summary>
     The size of the response sent by the SafeBrowsing PVer4 service, in KB.
@@ -52304,6 +52420,9 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
 
 <histogram name="SafeBrowsing.V4UpdateResult"
     enum="SafeBrowsingV4OperationResult">
+  <obsolete>
+    Replaced by SafeBrowsing.V4Update.Result.
+  </obsolete>
   <owner>vakh@chromium.org</owner>
   <summary>
     Track return status from V4 update attempts. The buckets of this histogram