Remove v1 of Startup.FirstWebContents.* stats deprecated in M48.

components/startup_metric_utils/browser/startup_metric_utils.cc

Index: components/startup_metric_utils/browser/startup_metric_utils.cc
diff --git a/components/startup_metric_utils/browser/startup_metric_utils.cc b/components/startup_metric_utils/browser/startup_metric_utils.cc
index 3f4144721d8c73ce73275ca3cc7232397f70ee1c..2a78031e6c041150d70e5c2557a1055fd165b0e5 100644
--- a/components/startup_metric_utils/browser/startup_metric_utils.cc
+++ b/components/startup_metric_utils/browser/startup_metric_utils.cc
@@ -468,20 +468,6 @@ void RecordFirstWebContentsMainFrameLoad(const base::TimeTicks& ticks) {
       g_process_creation_ticks.Get(), ticks);
 }
 
-void RecordDeprecatedFirstWebContentsMainFrameLoad(
-    const base::TimeTicks& ticks) {
-  static bool is_first_call = true;
-  if (!is_first_call || ticks.is_null())
-    return;
-  is_first_call = false;
-  if (WasNonBrowserUIDisplayed() || g_process_creation_ticks.Get().is_null())
-    return;
-
-  UMA_HISTOGRAM_WITH_STARTUP_TEMPERATURE(
-      UMA_HISTOGRAM_LONG_TIMES_100, "Startup.FirstWebContents.MainFrameLoad",
-      ticks - g_process_creation_ticks.Get());
-}
-
 void RecordFirstWebContentsNonEmptyPaint(const base::TimeTicks& ticks) {
   static bool is_first_call = true;
   if (!is_first_call || ticks.is_null())
@@ -495,20 +481,6 @@ void RecordFirstWebContentsNonEmptyPaint(const base::TimeTicks& ticks) {
       g_process_creation_ticks.Get(), ticks);
 }
 
-void RecordDeprecatedFirstWebContentsNonEmptyPaint(
-    const base::TimeTicks& ticks) {
-  static bool is_first_call = true;
-  if (!is_first_call || ticks.is_null())
-    return;
-  is_first_call = false;
-  if (WasNonBrowserUIDisplayed() || g_process_creation_ticks.Get().is_null())
-    return;
-
-  UMA_HISTOGRAM_WITH_STARTUP_TEMPERATURE(
-      UMA_HISTOGRAM_LONG_TIMES_100, "Startup.FirstWebContents.NonEmptyPaint",
-      ticks - g_process_creation_ticks.Get());
-}
-
 void RecordFirstWebContentsMainNavigationStart(const base::TimeTicks& ticks) {
   static bool is_first_call = true;
   if (!is_first_call || ticks.is_null())