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(

[Benoit L, 2017/05/22 13:37:16]

nit: Can you migrate the logic, instead of just forwarding?

It was probably planned for a future CL, but we might as well do it here as
well.

It's probably not easy to migrate it all, but at least some of it should be
possible to migrate, especially these static methods.

[trevordixon, 2017/05/24 20:39:24]

Moved the static methods over. I'll look into the others next.

[trevordixon, 2017/05/24 20:39:24]

Moved the static methods over. I'll look into the others next.

+    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);
+}
+
+////////////////////////////////////////////////////////////////////////////////

[Benoit L, 2017/05/22 13:37:16]

nit: Remove this.
It was in the code initially, and we didn't remove it, but I would prefer not to
introduce these comments in new code.

[trevordixon, 2017/05/23 13:05:15]

Done.

+// 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