Replace scoped_ptr with std::unique_ptr in //ui

ui/views/test/platform_test_helper.h

Index: ui/views/test/platform_test_helper.h
diff --git a/ui/views/test/platform_test_helper.h b/ui/views/test/platform_test_helper.h
index 158a7982c334a232f16c867e989f8bbdbcc69600..5bfd08be03a22daae70241db7a965af57f33a3fc 100644
--- a/ui/views/test/platform_test_helper.h
+++ b/ui/views/test/platform_test_helper.h
@@ -5,8 +5,9 @@
 #ifndef UI_VIEWS_TEST_PLATFORM_TEST_HELPER_H_
 #define UI_VIEWS_TEST_PLATFORM_TEST_HELPER_H_
 
+#include <memory>
+
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 
 namespace views {
 
@@ -15,7 +16,7 @@ class PlatformTestHelper {
   PlatformTestHelper() {}
   virtual ~PlatformTestHelper() {}
 
-  static scoped_ptr<PlatformTestHelper> Create();
+  static std::unique_ptr<PlatformTestHelper> Create();
 
   virtual bool IsMus() const = 0;