Convert //chrome/browser/ui from scoped_ptr to std::unique_ptr

chrome/browser/ui/webui/chromeos/proxy_settings_ui.cc

Index: chrome/browser/ui/webui/chromeos/proxy_settings_ui.cc
diff --git a/chrome/browser/ui/webui/chromeos/proxy_settings_ui.cc b/chrome/browser/ui/webui/chromeos/proxy_settings_ui.cc
index a9f5bfa1e93566c333817b98ca61318f034da840..674aefda5f51d195c1c8a1a1cc02fc8b047eddee 100644
--- a/chrome/browser/ui/webui/chromeos/proxy_settings_ui.cc
+++ b/chrome/browser/ui/webui/chromeos/proxy_settings_ui.cc
@@ -4,9 +4,10 @@
 
 #include "chrome/browser/ui/webui/chromeos/proxy_settings_ui.h"
 
+#include <memory>
+
 #include "base/macros.h"
 #include "base/memory/ref_counted_memory.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/values.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chromeos/system/input_device_settings.h"
@@ -50,7 +51,7 @@ class ProxySettingsHTMLSource : public content::URLDataSource {
   ~ProxySettingsHTMLSource() override {}
 
  private:
-  scoped_ptr<base::DictionaryValue> localized_strings_;
+  std::unique_ptr<base::DictionaryValue> localized_strings_;
 
   DISALLOW_COPY_AND_ASSIGN(ProxySettingsHTMLSource);
 };