Prerender: Remove PerceivedPLT histograms

chrome/browser/prerender/prerender_manager.cc

Index: chrome/browser/prerender/prerender_manager.cc
diff --git a/chrome/browser/prerender/prerender_manager.cc b/chrome/browser/prerender/prerender_manager.cc
index 192c34b1aee2e35b1f1a43fa7bc79d3376623c53..915f77699aa3e115272d79e0be8b9338a03103cb 100644
--- a/chrome/browser/prerender/prerender_manager.cc
+++ b/chrome/browser/prerender/prerender_manager.cc
@@ -522,35 +522,6 @@ void PrerenderManager::MoveEntryToPendingDelete(PrerenderContents* entry,
   PostCleanupTask();
 }
 
-void PrerenderManager::RecordPageLoadTimeNotSwappedIn(
-    Origin origin,
-    base::TimeDelta page_load_time,
-    const GURL& url) {
-  DCHECK_CURRENTLY_ON(BrowserThread::UI);
-  histograms_->RecordPageLoadTimeNotSwappedIn(origin, page_load_time, url);
-}
-
-void PrerenderManager::RecordPerceivedPageLoadTime(
-    Origin origin,
-    NavigationType navigation_type,
-    base::TimeDelta perceived_page_load_time,
-    double fraction_plt_elapsed_at_swap_in,
-    const GURL& url) {
-  DCHECK_CURRENTLY_ON(BrowserThread::UI);
-  if (GetPredictionStatusForOrigin(origin)
-      != NetworkPredictionStatus::ENABLED) {
-    return;
-  }
-
-  histograms_->RecordPerceivedPageLoadTime(
-      origin, perceived_page_load_time, navigation_type, url);
-
-  if (navigation_type == NAVIGATION_TYPE_PRERENDERED) {
-    histograms_->RecordPercentLoadDoneAtSwapin(
-        origin, fraction_plt_elapsed_at_swap_in);
-  }
-}
-
 void PrerenderManager::RecordPrefetchResponseReceived(Origin origin,
                                                       bool is_main_resource,
                                                       bool is_redirect,