Create LoadingDataCollector class and have observers rely on it instead of ResourcePrefetchPredictor

chrome/browser/predictors/glowplug_collector.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/predictors/glowplug_collector.h"
+#include "chrome/browser/predictors/resource_prefetch_predictor.h"
+#include "content/public/browser/resource_request_info.h"
+#include "content/public/common/resource_type.h"
+#include "net/url_request/url_request.h"
+
+namespace predictors {
+
+// static
+bool GlowplugCollector::ShouldRecordRequest(
+    net::URLRequest* request,
+    content::ResourceType resource_type) {
+  return ResourcePrefetchPredictor::ShouldRecordRequest(request, resource_type);
+}
+
+// static
+bool GlowplugCollector::ShouldRecordResponse(net::URLRequest* response) {
+  return ResourcePrefetchPredictor::ShouldRecordResponse(response);
+}
+
+// static
+bool GlowplugCollector::ShouldRecordRedirect(net::URLRequest* response) {
+  return ResourcePrefetchPredictor::ShouldRecordResponse(response);
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// GlowplugCollector
+
+GlowplugCollector::GlowplugCollector(ResourcePrefetchPredictor* predictor)
+    : predictor_(predictor) {}
+
+GlowplugCollector::~GlowplugCollector() {}
+
+void GlowplugCollector::RecordURLRequest(
+    const ResourcePrefetchPredictor::URLRequestSummary& request) {
+  predictor_->RecordURLRequest(request);
+}
+
+void GlowplugCollector::RecordURLResponse(
+    const ResourcePrefetchPredictor::URLRequestSummary& response) {
+  predictor_->RecordURLResponse(response);
+}
+
+void GlowplugCollector::RecordURLRedirect(
+    const ResourcePrefetchPredictor::URLRequestSummary& response) {
+  predictor_->RecordURLRedirect(response);
+}
+
+void GlowplugCollector::RecordMainFrameLoadComplete(
+    const NavigationID& navigation_id) {
+  predictor_->RecordMainFrameLoadComplete(navigation_id);
+}
+
+void GlowplugCollector::RecordFirstContentfulPaint(
+    const NavigationID& navigation_id,
+    const base::TimeTicks& first_contentful_paint) {
+  predictor_->RecordFirstContentfulPaint(navigation_id, first_contentful_paint);
+}
+
+}  // namespace predictors