Convert //ios from scoped_ptr to std::unique_ptr.

ios/chrome/browser/geolocation/omnibox_geolocation_local_state_unittest.mm

 // 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 "ios/chrome/browser/geolocation/omnibox_geolocation_local_state.h"
+
+#include <memory>
 #include <string>
 
 #include "base/mac/scoped_nsobject.h"
-#include "base/memory/scoped_ptr.h"
 #include "components/prefs/testing_pref_service.h"
 #include "ios/chrome/browser/geolocation/location_manager.h"
-#include "ios/chrome/browser/geolocation/omnibox_geolocation_local_state.h"
 #include "ios/chrome/test/ios_chrome_scoped_testing_local_state.h"
 #include "ios/chrome/test/testing_application_context.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "testing/gtest_mac.h"
 #include "testing/platform_test.h"
 
 namespace {
 
 class OmniboxGeolocationLocalStateTest : public PlatformTest {
  protected:
@@ skipping 10 matching lines @@
 
 TEST_F(OmniboxGeolocationLocalStateTest, LastAuthorizationAlertVersion) {
   EXPECT_TRUE([local_state_ lastAuthorizationAlertVersion].empty());
 
   std::string expectedVersion("fakeVersion");
   [local_state_ setLastAuthorizationAlertVersion:expectedVersion];
   EXPECT_EQ(expectedVersion, [local_state_ lastAuthorizationAlertVersion]);
 }
 
 }  // namespace