Remove stl_util's deletion function use and ScopedVector from chrome/browser/download/.

chrome/browser/download/download_status_updater.cc

Index: chrome/browser/download/download_status_updater.cc
diff --git a/chrome/browser/download/download_status_updater.cc b/chrome/browser/download/download_status_updater.cc
index 221fb7fcc70e6416d7acaae03e8c085424217528..f6e285e11693db7386b433f9d6e76d36ad4cd9f9 100644
--- a/chrome/browser/download/download_status_updater.cc
+++ b/chrome/browser/download/download_status_updater.cc
@@ -10,7 +10,7 @@
 
 #include "base/logging.h"
 #include "base/macros.h"
-#include "base/stl_util.h"
+#include "base/memory/ptr_util.h"
 #include "build/build_config.h"
 
 #if defined(OS_LINUX) && !defined(OS_CHROMEOS)
@@ -56,7 +56,6 @@ DownloadStatusUpdater::DownloadStatusUpdater() {
 }
 
 DownloadStatusUpdater::~DownloadStatusUpdater() {
-  base::STLDeleteElements(&notifiers_);
 }
 
 bool DownloadStatusUpdater::GetProgress(float* progress,
@@ -67,21 +66,19 @@ bool DownloadStatusUpdater::GetProgress(float* progress,
   int64_t received_bytes = 0;
   int64_t total_bytes = 0;
 
-  for (std::vector<AllDownloadItemNotifier*>::const_iterator it =
-       notifiers_.begin(); it != notifiers_.end(); ++it) {
-    if ((*it)->GetManager()) {
+  for (const auto& notifier : notifiers_) {
+    if (notifier->GetManager()) {
       content::DownloadManager::DownloadVector items;
-      (*it)->GetManager()->GetAllDownloads(&items);
-      for (content::DownloadManager::DownloadVector::const_iterator it =
-          items.begin(); it != items.end(); ++it) {
-        if ((*it)->GetState() == content::DownloadItem::IN_PROGRESS) {
+      notifier->GetManager()->GetAllDownloads(&items);
+      for (auto* item : items) {
+        if (item->GetState() == content::DownloadItem::IN_PROGRESS) {
           ++*download_count;
-          if ((*it)->GetTotalBytes() <= 0) {
+          if (item->GetTotalBytes() <= 0) {
             // There may or may not be more data coming down this pipe.
             progress_certain = false;
           } else {
-            received_bytes += (*it)->GetReceivedBytes();
-            total_bytes += (*it)->GetTotalBytes();
+            received_bytes += item->GetReceivedBytes();
+            total_bytes += item->GetTotalBytes();
           }
         }
       }
@@ -94,13 +91,12 @@ bool DownloadStatusUpdater::GetProgress(float* progress,
 }
 
 void DownloadStatusUpdater::AddManager(content::DownloadManager* manager) {
-  notifiers_.push_back(new AllDownloadItemNotifier(manager, this));
+  notifiers_.push_back(
+      base::MakeUnique<AllDownloadItemNotifier>(manager, this));
   content::DownloadManager::DownloadVector items;
   manager->GetAllDownloads(&items);
-  for (content::DownloadManager::DownloadVector::const_iterator
-       it = items.begin(); it != items.end(); ++it) {
-    OnDownloadCreated(manager, *it);
-  }
+  for (auto* item : items)
+    OnDownloadCreated(manager, item);
 }
 
 void DownloadStatusUpdater::OnDownloadCreated(