1 files changed, 37 insertions, 8 deletions
diff --git a/chromium/components/query_tiles/internal/stats.cc b/chromium/components/query_tiles/internal/stats.cc
index 21058ac35f6..87adf0db2cd 100644
--- a/chromium/components/query_tiles/internal/stats.cc
+++ b/chromium/components/query_tiles/internal/stats.cc
@@ -5,31 +5,60 @@
 #include "components/query_tiles/internal/stats.h"
 
 #include "base/metrics/histogram_functions.h"
-#include "base/metrics/histogram_macros.h"
 
 namespace query_tiles {
 namespace stats {
 
+const char kImagePreloadingHistogram[] =
+    "Search.QueryTiles.ImagePreloadingEvent";
+
+const char kHttpResponseCodeHistogram[] =
+    "Search.QueryTiles.FetcherHttpResponseCode";
+
+const char kNetErrorCodeHistogram[] = "Search.QueryTiles.FetcherNetErrorCode";
+
+const char kRequestStatusHistogram[] = "Search.QueryTiles.RequestStatus";
+
+const char kGroupStatusHistogram[] = "Search.QueryTiles.GroupStatus";
+
+const char kFirstFlowDurationHistogram[] =
+    "Search.QueryTiles.Fetcher.FirstFlowDuration";
+
+const char kFetcherStartHourHistogram[] = "Search.QueryTiles.Fetcher.Start";
+
+const char kPrunedGroupReasonHistogram[] =
+    "Search.QueryTiles.Group.PruneReason";
+
 void RecordImageLoading(ImagePreloadingEvent event) {
-  UMA_HISTOGRAM_ENUMERATION("Search.QueryTiles.ImagePreloadingEvent", event);
+  base::UmaHistogramEnumeration(kImagePreloadingHistogram, event);
 }
 
 void RecordTileFetcherResponseCode(int response_code) {
-  base::UmaHistogramSparse("Search.QueryTiles.FetcherHttpResponseCode",
-                           response_code);
+  base::UmaHistogramSparse(kHttpResponseCodeHistogram, response_code);
 }
 
 void RecordTileFetcherNetErrorCode(int error_code) {
-  base::UmaHistogramSparse("Search.QueryTiles.FetcherNetErrorCode",
-                           -error_code);
+  base::UmaHistogramSparse(kNetErrorCodeHistogram, -error_code);
 }
 
 void RecordTileRequestStatus(TileInfoRequestStatus status) {
-  UMA_HISTOGRAM_ENUMERATION("Search.QueryTiles.RequestStatus", status);
+  base::UmaHistogramEnumeration(kRequestStatusHistogram, status);
 }
 
 void RecordTileGroupStatus(TileGroupStatus status) {
-  UMA_HISTOGRAM_ENUMERATION("Search.QueryTiles.GroupStatus", status);
+  base::UmaHistogramEnumeration(kGroupStatusHistogram, status);
+}
+
+void RecordFirstFetchFlowDuration(int hours) {
+  base::UmaHistogramCounts100(kFirstFlowDurationHistogram, hours);
+}
+
+void RecordExplodeOnFetchStarted(int explode_hour) {
+  base::UmaHistogramExactLinear(kFetcherStartHourHistogram, explode_hour, 24);
+}
+
+void RecordGroupPruned(PrunedGroupReason reason) {
+  base::UmaHistogramEnumeration(kPrunedGroupReasonHistogram, reason);
 }
 
 }  // namespace stats