predictors: Introduce GlowplugPredictor.

chrome/browser/page_load_metrics/observers/resource_prefetch_predictor_page_load_metrics_observer.cc

 // Copyright 2017 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/page_load_metrics/observers/resource_prefetch_predictor_page_load_metrics_observer.h"
 
+#include <memory>
+
 #include "base/memory/ptr_util.h"
 #include "chrome/browser/page_load_metrics/page_load_metrics_util.h"
+#include "chrome/browser/predictors/loading_predictor.h"
+#include "chrome/browser/predictors/loading_predictor_factory.h"
 #include "chrome/browser/predictors/resource_prefetch_predictor.h"
-#include "chrome/browser/predictors/resource_prefetch_predictor_factory.h"
+#include "chrome/browser/profiles/profile.h"
 #include "content/public/browser/web_contents.h"
 
 namespace internal {
 
 const char kHistogramResourcePrefetchPredictorFirstContentfulPaint[] =
     "PageLoad.Clients.ResourcePrefetchPredictor.PaintTiming."
     "NavigationToFirstContentfulPaint.Prefetchable";
 const char kHistogramResourcePrefetchPredictorFirstMeaningfulPaint[] =
     "PageLoad.Clients.ResourcePrefetchPredictor.Experimental.PaintTiming."
     "NavigationToFirstMeaningfulPaint.Prefetchable";
 
 }  // namespace internal
 
 // static
 std::unique_ptr<ResourcePrefetchPredictorPageLoadMetricsObserver>
 ResourcePrefetchPredictorPageLoadMetricsObserver::CreateIfNeeded(
     content::WebContents* web_contents) {
-  predictors::ResourcePrefetchPredictor* predictor =
-      predictors::ResourcePrefetchPredictorFactory::GetForProfile(
-          web_contents->GetBrowserContext());
-  if (!predictor)
+  auto* loading_predictor = predictors::LoadingPredictorFactory::GetForProfile(
+      Profile::FromBrowserContext(web_contents->GetBrowserContext()));
+  if (!loading_predictor)
     return nullptr;
   return base::MakeUnique<ResourcePrefetchPredictorPageLoadMetricsObserver>(
-      predictor, web_contents);
+      loading_predictor->resource_prefetch_predictor(), web_contents);
 }
 
 ResourcePrefetchPredictorPageLoadMetricsObserver::
     ResourcePrefetchPredictorPageLoadMetricsObserver(
         predictors::ResourcePrefetchPredictor* predictor,
         content::WebContents* web_contents)
     : predictor_(predictor),
       web_contents_(web_contents),
       record_histograms_(false) {
   DCHECK(predictor_);
@@ skipping 39 matching lines @@
 
 void ResourcePrefetchPredictorPageLoadMetricsObserver::OnFirstMeaningfulPaint(
     const page_load_metrics::PageLoadTiming& timing,
     const page_load_metrics::PageLoadExtraInfo& extra_info) {
   if (record_histograms_) {
     PAGE_LOAD_HISTOGRAM(
         internal::kHistogramResourcePrefetchPredictorFirstMeaningfulPaint,
         timing.paint_timing.first_meaningful_paint.value());
   }
 }