[perf] Clean up the nomenclature of the regression filtering.

Bug: skia:
Change-Id: Iaa57f9524817a1d7464dd9e42e8764bb223f6d48
Reviewed-on: https://skia-review.googlesource.com/20154
Reviewed-by: Joe Gregorio <jcgregorio@google.com>
Commit-Queue: Joe Gregorio <jcgregorio@google.com>
diff --git a/perf/go/regression/db.go b/perf/go/regression/db.go
index 15fac6c..9146e34 100644
--- a/perf/go/regression/db.go
+++ b/perf/go/regression/db.go
@@ -16,9 +16,9 @@
 type Subset string
 
 const (
-	ALL_SUBSET       Subset = "all"       // Include all regressions in a range.
-	FLAGGED_SUBSET   Subset = "flagged"   // Only include regressions in a range that are alerting.
-	UNTRIAGED_SUBSET Subset = "untriaged" // All untriaged alerting regressions regardless of range.
+	ALL_SUBSET         Subset = "all"         // Include all regressions in a range.
+	REGRESSIONS_SUBSET Subset = "regressions" // Only include regressions in a range that are alerting.
+	UNTRIAGED_SUBSET   Subset = "untriaged"   // All untriaged alerting regressions regardless of range.
 )
 
 // Store persists Regressions to/from an SQL database.
diff --git a/perf/res/imp/triage-page.html b/perf/res/imp/triage-page.html
index 73a3b15..19983d7 100644
--- a/perf/res/imp/triage-page.html
+++ b/perf/res/imp/triage-page.html
@@ -88,8 +88,8 @@
         on-selected-item-changed="_updateRange"
         >
         <div value=all title="Show results for all commits in the time range.">All</div>
-        <div value=flagged title="Show only the commits with alerts in the given time range.">Flagged</div>
-        <div value=untriaged title="Show all the untriaged alerts regardless of the time range.">Untriaged</div>
+        <div value=flagged title="Show only the commits with regressions in the given time range regardless of triage status.">Regressions</div>
+        <div value=untriaged title="Show all the untriaged regressions regardless of the time range.">Untriaged</div>
       </iron-selector>
     </details-sk>
     <details-sk>