Remove ScopedVector from ios/.

ios/chrome/browser/ui/webui/crashes_ui.cc

Index: ios/chrome/browser/ui/webui/crashes_ui.cc
diff --git a/ios/chrome/browser/ui/webui/crashes_ui.cc b/ios/chrome/browser/ui/webui/crashes_ui.cc
index 6286a34f44c4f216a42e5eaabd53396c9d78a36a..208255c2eff1d3a5ca46556e72ec321397e15083 100644
--- a/ios/chrome/browser/ui/webui/crashes_ui.cc
+++ b/ios/chrome/browser/ui/webui/crashes_ui.cc
@@ -9,6 +9,7 @@
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/macros.h"
+#include "base/memory/ptr_util.h"
 #include "base/memory/ref_counted_memory.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/sys_info.h"
@@ -149,7 +150,7 @@ void CrashesDOMHandler::UpdateUI() {
 ///////////////////////////////////////////////////////////////////////////////
 
 CrashesUI::CrashesUI(web::WebUIIOS* web_ui) : web::WebUIIOSController(web_ui) {
-  web_ui->AddMessageHandler(new CrashesDOMHandler());
+  web_ui->AddMessageHandler(base::MakeUnique<CrashesDOMHandler>());
 
   // Set up the chrome://crashes/ source.
   web::WebUIIOSDataSource::Add(ios::ChromeBrowserState::FromWebUIIOS(web_ui),