Collect loading signal data from the background loader offliner

chrome/browser/android/offline_pages/background_loader_offliner.h

 // Copyright 2016 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.
 
 #ifndef CHROME_BROWSER_ANDROID_OFFLINE_PAGES_BACKGROUND_LOADER_OFFLINER_H_
 #define CHROME_BROWSER_ANDROID_OFFLINE_PAGES_BACKGROUND_LOADER_OFFLINER_H_
 
 #include <memory>
 
 #include "base/android/application_status_listener.h"
 #include "base/memory/weak_ptr.h"
+#include "base/values.h"
 #include "components/offline_pages/content/background_loader/background_loader_contents.h"
 #include "components/offline_pages/core/background/offliner.h"
 #include "components/offline_pages/core/offline_page_types.h"
 #include "components/offline_pages/core/snapshot_controller.h"
 #include "content/public/browser/web_contents_observer.h"
 
 namespace content {
 class BrowserContext;
 }  // namespace content
 
@@ skipping 50 matching lines @@
 
   // Called when the page has been saved.
   void OnPageSaved(SavePageResult save_result, int64_t offline_id);
 
   // Called when application state has changed.
   void OnApplicationStateChange(
       base::android::ApplicationState application_state);
   void HandleApplicationStateChangeCancel(const SavePageRequest& request,
                                           int64_t offline_id);
 
+  // Called to remember at what time we started loading.
+  void MarkLoadStartTime();
+
+  // Called to add a loading signal as we observe it.
+  void AddLoadingSignal(const char* signal_name);
+
   std::unique_ptr<background_loader::BackgroundLoaderContents> loader_;
   // Not owned.
   content::BrowserContext* browser_context_;
   // Not owned.
   OfflinePageModel* offline_page_model_;
   // Not owned.
   const OfflinerPolicy* policy_;
   // Tracks pending request, if any.
   std::unique_ptr<SavePageRequest> pending_request_;
   // Handles determining when a page should be snapshotted.
@@ skipping 13 matching lines @@
   PageLoadState page_load_state_;
   // Seconds to delay before taking snapshot.
   long page_delay_ms_;
   // Network bytes loaded.
   int64_t network_bytes_;
   // Whether the low bar of snapshot quality has been met.
   bool is_low_bar_met_;
   // Whether the snapshot is on the last retry.
   bool did_snapshot_on_last_retry_;
 
+  // Time in ticks of when we start loading the page.
+  base::TimeTicks load_start_time_;
+
+  // Saves loading signals.
+  // TODO(petewil): We will be replacing this with the new snapshot controller.
+  base::DictionaryValue signal_data_;
+
   // Callback for cancel.
   CancelCallback cancel_callback_;
 
   base::WeakPtrFactory<BackgroundLoaderOffliner> weak_ptr_factory_;
   DISALLOW_COPY_AND_ASSIGN(BackgroundLoaderOffliner);
 };
 
 }  // namespace offline_pages
 #endif  // CHROME_BROWSER_ANDROID_OFFLINE_PAGES_BACKGROUND_LOADER_OFFLINER_H_