Convert //ash from scoped_ptr to std::unique_ptr

ash/display/display_error_observer_chromeos_unittest.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ash/display/display_error_observer_chromeos.h"
 
 #include "ash/shell.h"
 #include "ash/test/ash_test_base.h"
 #include "grit/ash_strings.h"
 #include "ui/aura/window.h"
@@ skipping 17 matching lines @@
   }
 
  protected:
   DisplayErrorObserver* observer() { return observer_.get(); }
 
   base::string16 GetMessageContents() {
     return observer_->GetDisplayErrorNotificationMessageForTest();
   }
 
  private:
-  scoped_ptr<DisplayErrorObserver> observer_;
+  std::unique_ptr<DisplayErrorObserver> observer_;
 
   DISALLOW_COPY_AND_ASSIGN(DisplayErrorObserverTest);
 };
 
 TEST_F(DisplayErrorObserverTest, Normal) {
   if (!SupportsMultipleDisplays())
     return;
 
   UpdateDisplay("200x200,300x300");
   observer()->OnDisplayModeChangeFailed(
@@ skipping 34 matching lines @@
             GetMessageContents());
 
   observer()->OnDisplayModeChangeFailed(
       ui::DisplayConfigurator::DisplayStateList(),
       ui::MULTIPLE_DISPLAY_STATE_DUAL_EXTENDED);
   EXPECT_EQ(l10n_util::GetStringUTF16(IDS_ASH_DISPLAY_FAILURE_ON_NON_MIRRORING),
             GetMessageContents());
 }
 
 }  // namespace ash