Convert //chrome/browser/ui from scoped_ptr to std::unique_ptr

chrome/browser/ui/cocoa/omnibox/omnibox_popup_cell_unittest.mm

 // Copyright (c) 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.
 
 #import "chrome/browser/ui/cocoa/omnibox/omnibox_popup_cell.h"
 
 #include <stddef.h>
 
 #include "base/json/json_reader.h"
 #include "base/mac/scoped_nsobject.h"
@@ skipping 55 matching lines @@
 TEST_F(OmniboxPopupCellTest, AnswerStyle) {
   const char* weatherJson =
       "{\"l\": [ {\"il\": {\"t\": [ {"
       "\"t\": \"weather in pari&lt;b&gt;s&lt;/b&gt;\", \"tt\": 8} ]}}, {"
       "\"il\": {\"at\": {\"t\": \"Thu\",\"tt\": 12}, "
       "\"i\": {\"d\": \"//ssl.gstatic.com/onebox/weather/64/cloudy.png\","
       "\"t\": 3}, \"t\": [ {\"t\": \"46\",\"tt\": 1}, {"
       "\"t\": \"°F\",\"tt\": 3} ]}} ]}";
   NSString* finalString = @"46°F Thu";
 
-  scoped_ptr<base::Value> root(base::JSONReader::Read(weatherJson));
+  std::unique_ptr<base::Value> root(base::JSONReader::Read(weatherJson));
   ASSERT_NE(root, nullptr);
   base::DictionaryValue* dictionary;
   root->GetAsDictionary(&dictionary);
   ASSERT_NE(dictionary, nullptr);
   AutocompleteMatch match;
   match.answer = SuggestionAnswer::ParseAnswer(dictionary);
   EXPECT_TRUE(match.answer);
   cellData_.reset([[OmniboxPopupCellData alloc] initWithMatch:match
                                                contentsOffset:0
                                                         image:nil
                                                   answerImage:nil]);
   EXPECT_NSEQ([[cellData_ description] string], finalString);
   size_t length = [[[cellData_ description] string] length];
   const NSRange checkValues[] = {{0, 2}, {2, 2}, {4, 4}};
   EXPECT_EQ(length, 8UL);
   NSDictionary* lastAttributes = nil;
   for (const NSRange& value : checkValues) {
     NSRange range;
     NSDictionary* currentAttributes =
         [[cellData_ description] attributesAtIndex:value.location
                                     effectiveRange:&range];
     EXPECT_TRUE(NSEqualRanges(value, range));
     EXPECT_FALSE([currentAttributes isEqualToDictionary:lastAttributes]);
     lastAttributes = currentAttributes;
   }
 }
 
 }  // namespace