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

components/safe_browsing_db/v4_get_hash_protocol_manager.cc

Index: components/safe_browsing_db/v4_get_hash_protocol_manager.cc
diff --git a/components/safe_browsing_db/v4_get_hash_protocol_manager.cc b/components/safe_browsing_db/v4_get_hash_protocol_manager.cc
index 417e1fa887d6271e5b889e215efb87fa3bc5c8a8..1cc614916ecd82ba37667c7bb4c1bc5ad88f37ef 100644
--- a/components/safe_browsing_db/v4_get_hash_protocol_manager.cc
+++ b/components/safe_browsing_db/v4_get_hash_protocol_manager.cc
@@ -27,7 +27,7 @@ namespace {
 // Record a GetHash result.
 void RecordGetHashResult(safe_browsing::V4OperationResult result) {
   UMA_HISTOGRAM_ENUMERATION(
-      "SafeBrowsing.GetV4HashResult", result,
+      "SafeBrowsing.V4GetHash.Result", result,
       safe_browsing::V4OperationResult::OPERATION_RESULT_MAX);
 }
 
@@ -67,7 +67,7 @@ enum ParseResultType {
 
 // Record parsing errors of a GetHash result.
 void RecordParseGetHashResult(ParseResultType result_type) {
-  UMA_HISTOGRAM_ENUMERATION("SafeBrowsing.ParseV4HashResult", result_type,
+  UMA_HISTOGRAM_ENUMERATION("SafeBrowsing.V4GetHash.Parse.Result", result_type,
                             PARSE_RESULT_TYPE_MAX);
 }
 
@@ -90,8 +90,8 @@ enum V4FullHashCacheResultType {
 
 // Record a full hash cache hit result.
 void RecordV4FullHashCacheResult(V4FullHashCacheResultType result_type) {
-  UMA_HISTOGRAM_ENUMERATION("SafeBrowsing.V4FullHashCacheResult", result_type,
-                            FULL_HASH_CACHE_RESULT_MAX);
+  UMA_HISTOGRAM_ENUMERATION("SafeBrowsing.V4GetHash.CacheHit.Result",
+                            result_type, FULL_HASH_CACHE_RESULT_MAX);
 }
 
 // Enumerate GetHash hits/misses for histogramming purposes. DO NOT CHANGE THE
@@ -113,7 +113,7 @@ enum V4GetHashCheckResultType {
 
 // Record a GetHash hit result.
 void RecordV4GetHashCheckResult(V4GetHashCheckResultType result_type) {
-  UMA_HISTOGRAM_ENUMERATION("SafeBrowsing.V4GetHashCheckResult", result_type,
+  UMA_HISTOGRAM_ENUMERATION("SafeBrowsing.V4GetHash.Check.Result", result_type,
                             GET_HASH_CHECK_RESULT_MAX);
 }
 
@@ -724,7 +724,7 @@ void V4GetHashProtocolManager::OnURLFetchComplete(
   }
 
   const std::unique_ptr<FullHashCallbackInfo>& fhci = it->second;
-  UMA_HISTOGRAM_LONG_TIMES("SafeBrowsing.V4GetHashNetwork.Time",
+  UMA_HISTOGRAM_LONG_TIMES("SafeBrowsing.V4GetHash.Network.Time",
                            clock_->Now() - fhci->network_start_time);
   UpdateCache(fhci->prefixes_requested, full_hash_infos, negative_cache_expire);
   MergeResults(fhci->full_hash_to_store_and_hash_prefixes, full_hash_infos,