Add browser test for CustomizationWallpaperDownloader.

chrome/browser/chromeos/customization_wallpaper_downloader.cc

 // Copyright 2014 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/chromeos/customization_wallpaper_downloader.h"
 
 #include <math.h>
 #include <algorithm>
 
 #include "base/file_util.h"
@@ skipping 54 matching lines @@
     const base::FilePath& wallpaper_downloaded_file,
     base::Callback<void(bool success, const GURL&)>
         on_wallpaper_fetch_completed)
     : url_context_getter_(url_context_getter),
       wallpaper_url_(wallpaper_url),
       wallpaper_dir_(wallpaper_dir),
       wallpaper_downloaded_file_(wallpaper_downloaded_file),
       wallpaper_temporary_file_(wallpaper_downloaded_file.value() +
                                 kTemporarySuffix),
       retries_(0),
+      retry_delay_(base::TimeDelta::FromSeconds(kRetrySleepSeconds)),
+      retry_current_delay_(base::TimeDelta::FromSeconds(0)),

[Daniel Erat, 2014/05/07 00:10:33]

don't need to initialize this; a 0-second delay is the default

[Alexander Alekseev, 2014/05/07 00:26:08]

Done.

       on_wallpaper_fetch_completed_(on_wallpaper_fetch_completed),
       weak_factory_(this) {
   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
 }
 
 CustomizationWallpaperDownloader::~CustomizationWallpaperDownloader() {
   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
 }
 
 void CustomizationWallpaperDownloader::StartRequest() {
@@ skipping 13 matching lines @@
   url_fetcher_->SaveResponseToFileAtPath(
       wallpaper_temporary_file_,
       blocking_pool->GetSequencedTaskRunner(blocking_pool->GetSequenceToken()));
   url_fetcher_->Start();
 }
 
 void CustomizationWallpaperDownloader::Retry() {
   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
   ++retries_;
 
-  const double delay_seconds =
-      std::min(kMaxRetrySleepSeconds,
-               static_cast<double>(retries_) * retries_ * kRetrySleepSeconds);
-  const base::TimeDelta delay =
-      base::TimeDelta::FromSeconds(lround(delay_seconds));
+  const double delay_seconds = std::min(
+      kMaxRetrySleepSeconds,
+      static_cast<double>(retries_) * retries_ * retry_delay_.InSecondsF());
+  const base::TimeDelta delay = base::TimeDelta::FromSecondsD(delay_seconds);
 
   VLOG(1) << "Schedule Customized Wallpaper download in " << delay.InSecondsF()
           << " seconds (retry = " << retries_ << ").";
+  retry_current_delay_ = delay;
   request_scheduled_.Start(
       FROM_HERE, delay, this, &CustomizationWallpaperDownloader::StartRequest);
 }
 
 void CustomizationWallpaperDownloader::Start() {
   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
   scoped_ptr<bool> success(new bool(false));
 
   base::Closure mkdir_closure = base::Bind(&CreateWallpaperDirectory,
                                            wallpaper_dir_,
@@ skipping 59 matching lines @@
   }
 }
 
 void CustomizationWallpaperDownloader::OnTemporaryFileRenamed(
     scoped_ptr<bool> success) {
   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
   on_wallpaper_fetch_completed_.Run(*success, wallpaper_url_);
 }
 
 }  //   namespace chromeos