Convert //ash from scoped_ptr to std::unique_ptr

ash/test/ash_test_helper_unittest.cc

Index: ash/test/ash_test_helper_unittest.cc
diff --git a/ash/test/ash_test_helper_unittest.cc b/ash/test/ash_test_helper_unittest.cc
index 07b511788fc77ef93d46b1343324f84edf91fb27..0d2c436715f3912c680e3d27ef4d773ea7f6c1be 100644
--- a/ash/test/ash_test_helper_unittest.cc
+++ b/ash/test/ash_test_helper_unittest.cc
@@ -36,7 +36,7 @@ class AshTestHelperTest : public testing::Test {
 
  private:
   base::MessageLoopForUI message_loop_;
-  scoped_ptr<ash::test::AshTestHelper> ash_test_helper_;
+  std::unique_ptr<ash::test::AshTestHelper> ash_test_helper_;
 
   DISALLOW_COPY_AND_ASSIGN(AshTestHelperTest);
 };
@@ -50,7 +50,7 @@ TEST_F(AshTestHelperTest, AshTestHelper) {
 
   // Enough state is initialized to create a window.
   using views::Widget;
-  scoped_ptr<Widget> w1(new Widget);
+  std::unique_ptr<Widget> w1(new Widget);
   Widget::InitParams params;
   params.ownership = Widget::InitParams::WIDGET_OWNS_NATIVE_WIDGET;
   params.context = ash_test_helper()->CurrentContext();