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

ios/web/web_state/js/crw_js_early_script_manager_unittest.mm

 // Copyright 2014 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.
 
 #import "ios/web/web_state/js/crw_js_early_script_manager.h"
 
 #include "base/mac/scoped_nsobject.h"
+#include "base/memory/ptr_util.h"
 #import "ios/web/public/test/crw_test_js_injection_receiver.h"
 #include "ios/web/public/test/scoped_testing_web_client.h"
 #include "ios/web/public/web_client.h"
 #import "ios/web/web_state/js/page_script_util.h"
 #import "testing/gtest_mac.h"
 #include "testing/platform_test.h"
 
 namespace web {
 namespace {
 
 class CRWJSEarlyScriptManagerTest : public PlatformTest {
  public:
-  CRWJSEarlyScriptManagerTest() : web_client_(make_scoped_ptr(new WebClient)) {}
+  CRWJSEarlyScriptManagerTest()
+      : web_client_(base::WrapUnique(new WebClient)) {}
 
  protected:
   void SetUp() override {
     PlatformTest::SetUp();
     receiver_.reset([[CRWTestJSInjectionReceiver alloc] init]);
     earlyScriptManager_.reset(static_cast<CRWJSEarlyScriptManager*>(
         [[receiver_ instanceOfClass:[CRWJSEarlyScriptManager class]] retain]));
   }
 
   // Required for CRWJSEarlyScriptManager creation.
@@ skipping 12 matching lines @@
   // |earlyScript| is a substring of |injectionContent|. The latter wraps the
   // former with "if (typeof __gCrWeb !== 'object')" check to avoid multiple
   // injections.
   EXPECT_NE(NSNotFound,
             static_cast<NSInteger>(
                 [injectionContent rangeOfString:earlyScript].location));
 }
 
 }  // namespace
 }  // namespace web