Remove ScopedVector from ios/.

ios/chrome/browser/ui/webui/gcm/gcm_internals_ui.cc

Index: ios/chrome/browser/ui/webui/gcm/gcm_internals_ui.cc
diff --git a/ios/chrome/browser/ui/webui/gcm/gcm_internals_ui.cc b/ios/chrome/browser/ui/webui/gcm/gcm_internals_ui.cc
index 0d69bda617fba1d8aeb4137f0d555c2c301eb373..2464355b60036002f63790263d06f433b25a21bf 100644
--- a/ios/chrome/browser/ui/webui/gcm/gcm_internals_ui.cc
+++ b/ios/chrome/browser/ui/webui/gcm/gcm_internals_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/weak_ptr.h"
 #include "base/values.h"
 #include "components/gcm_driver/gcm_client.h"
@@ -171,7 +172,7 @@ GCMInternalsUI::GCMInternalsUI(web::WebUIIOS* web_ui)
   web::WebUIIOSDataSource::Add(ios::ChromeBrowserState::FromWebUIIOS(web_ui),
                                html_source);
 
-  web_ui->AddMessageHandler(new GcmInternalsUIMessageHandler());
+  web_ui->AddMessageHandler(base::MakeUnique<GcmInternalsUIMessageHandler>());
 }
 
 GCMInternalsUI::~GCMInternalsUI() {}