Prerender: Remove PerceivedPLT histograms

chrome/browser/prerender/prerender_manager.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/prerender/prerender_manager.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <functional>
@@ skipping 504 matching lines @@
   DCHECK(entry);
 
   PrerenderDataVector::iterator it = FindIteratorForPrerenderContents(entry);
   DCHECK(it != active_prerenders_.end());
   to_delete_prerenders_.push_back(std::move(*it));
   active_prerenders_.erase(it);
   // Destroy the old WebContents relatively promptly to reduce resource usage.
   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,
                                                       bool is_no_store) {
   histograms_->RecordPrefetchResponseReceived(origin, is_main_resource,
                                               is_redirect, is_no_store);
 }
 
 void PrerenderManager::RecordPrefetchRedirectCount(Origin origin,
                                                    bool is_main_resource,
@@ skipping 875 matching lines @@
   return weak_factory_.GetWeakPtr();
 }
 
 void PrerenderManager::SetPrerenderContentsFactoryForTest(
     PrerenderContents::Factory* prerender_contents_factory) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   prerender_contents_factory_.reset(prerender_contents_factory);
 }
 
 }  // namespace prerender