Replace ObjCPropertyReleaser with ReleaseProperties() project-wide.

ios/chrome/browser/ui/downloads/download_manager_controller.mm

Index: ios/chrome/browser/ui/downloads/download_manager_controller.mm
diff --git a/ios/chrome/browser/ui/downloads/download_manager_controller.mm b/ios/chrome/browser/ui/downloads/download_manager_controller.mm
index 96cede0dab8d410634bf982f714d2a1f83f8c9a5..96d402fd5c35830ce94ef56d26b76c1cef5ca205 100644
--- a/ios/chrome/browser/ui/downloads/download_manager_controller.mm
+++ b/ios/chrome/browser/ui/downloads/download_manager_controller.mm
@@ -12,11 +12,10 @@
 #include "base/ios/weak_nsobject.h"
 #include "base/location.h"
 #include "base/mac/bind_objc_block.h"
-#include "base/mac/objc_property_releaser.h"
+#include "base/mac/objc_release_properties.h"
 #include "base/mac/scoped_nsobject.h"
 #include "base/memory/ref_counted.h"
 #include "base/metrics/histogram_macros.h"
-#include "base/metrics/histogram_macros.h"
 #include "base/metrics/user_metrics.h"
 #include "base/metrics/user_metrics_action.h"
 #include "base/strings/sys_string_conversions.h"
@@ -388,7 +387,6 @@ class DownloadContentDelegate : public URLFetcherDelegate {
   // Set to YES when a file is downloaded and is used to determine if the
   // DownloadedFileAction histogram needs to be recorded on -dealloc.
   BOOL _recordFileActionHistogram;
-  base::mac::ObjCPropertyReleaser _propertyReleaser_DownloadManagerController;
 }
 
 // The container that holds the |documentIcon|, the |progressBar|, the
@@ -525,9 +523,6 @@ class DownloadContentDelegate : public URLFetcherDelegate {
   self = [super initWithNibName:@"DownloadManagerController" url:url];
   if (self) {
     _downloadManagerId = g_download_manager_id++;
-    _propertyReleaser_DownloadManagerController.Init(
-        self, [DownloadManagerController class]);
-
     _requestContextGetter = requestContextGetter;
     _headFetcherDelegate.reset(new DownloadHeadDelegate(self));
     _contentFetcherDelegate.reset(new DownloadContentDelegate(self));
@@ -629,6 +624,7 @@ class DownloadContentDelegate : public URLFetcherDelegate {
     UMA_HISTOGRAM_ENUMERATION(kUMADownloadedFileAction, NO_ACTION,
                               DOWNLOADED_FILE_ACTION_COUNT);
   }
+  base::mac::ReleaseProperties(self);
   [super dealloc];
 }