Convert //chrome/installer from scoped_ptr to std::unique_ptr

chrome/installer/util/beacons.h

Index: chrome/installer/util/beacons.h
diff --git a/chrome/installer/util/beacons.h b/chrome/installer/util/beacons.h
index bec393e4ec09d26b0af389d46d765fe6ae28af21..e1bdaa68f9f6538be403cb8a9516314b9d0d1ae2 100644
--- a/chrome/installer/util/beacons.h
+++ b/chrome/installer/util/beacons.h
@@ -7,8 +7,9 @@
 
 #include <windows.h>
 
+#include <memory>
+
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/strings/string16.h"
 #include "base/strings/string_piece.h"
 #include "base/time/time.h"
@@ -40,19 +41,19 @@ namespace installer_util {
 class Beacon;
 
 // Returns a Beacon representing the last time the machine's OS was ugpraded.
-scoped_ptr<Beacon> MakeLastOsUpgradeBeacon(
+std::unique_ptr<Beacon> MakeLastOsUpgradeBeacon(
     bool system_install,
     const AppRegistrationData& registration_data);
 
 // Returns a Beacon representing the last time Chrome was the user's default
 // browser.
-scoped_ptr<Beacon> MakeLastWasDefaultBeacon(
+std::unique_ptr<Beacon> MakeLastWasDefaultBeacon(
     bool system_install,
     const AppRegistrationData& registration_data);
 
 // Returns a Beacon representing the first time Chrome was not the user's
 // default browser.
-scoped_ptr<Beacon> MakeFirstNotDefaultBeacon(
+std::unique_ptr<Beacon> MakeFirstNotDefaultBeacon(
     bool system_install,
     const AppRegistrationData& registration_data);