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

ios/chrome/tools/strings/generate_localizable_strings.mm

 // Copyright 2016 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.
 
 // Helper tool that is built and run during a build to pull strings from the
 // GRD files and generate a localized string files needed for iOS app bundles.
 // Arguments:
 //   -p dir_to_data_pak
 //   -o output_dir
 //   -c config_file
@@ skipping 23 matching lines @@
 #include "base/mac/scoped_nsautorelease_pool.h"
 #include "base/strings/string_piece.h"
 #include "base/strings/sys_string_conversions.h"
 #include "ui/base/resource/data_pack.h"
 #include "ui/base/resource/resource_handle.h"
 
 namespace {
 
 // Load the packed resource data pack for |locale| from |packed_data_pack_dir|.
 // If loading fails, null is returned.
-scoped_ptr<ui::DataPack> LoadResourceDataPack(NSString* packed_data_pack_dir,
-                                              NSString* locale_name) {
-  scoped_ptr<ui::DataPack> resource_data_pack;
+std::unique_ptr<ui::DataPack> LoadResourceDataPack(
+    NSString* packed_data_pack_dir,
+    NSString* locale_name) {
+  std::unique_ptr<ui::DataPack> resource_data_pack;
   NSString* resource_path =
       [NSString stringWithFormat:@"%@/%@.lproj/locale.pak",
                                  packed_data_pack_dir, locale_name];
 
   if (!resource_path)
     return resource_data_pack;
 
   // FilePath may contain components that references parent directory
   // (".."). DataPack disallows paths with ".." for security reasons.
   base::FilePath resources_pak_path([resource_path fileSystemRepresentation]);
@@ skipping 272 matching lines @@
   }
 
   NSArray* outputs = [config objectForKey:@"outputs"];
 
   if (![outputs count]) {
     fprintf(stderr, "ERROR: No output in config file\n");
     exit(1);
   }
 
   for (NSString* locale in locales) {
-    scoped_ptr<ui::DataPack> data_pack =
+    std::unique_ptr<ui::DataPack> data_pack =
         LoadResourceDataPack(data_pack_dir, locale);
     if (!data_pack) {
       fprintf(stderr, "ERROR: Failed to load branded pak for language: %s\n",
               [locale UTF8String]);
       exit(1);
     }
 
     for (NSDictionary* output : [config objectForKey:@"outputs"]) {
       NSString* output_name = [output objectForKey:@"name"];
       if (!output_name) {
@@ skipping 14 matching lines @@
                             output_name);
       } else {
         fprintf(stderr, "ERROR: Unable to create %s.\n",
                 [output_name UTF8String]);
         exit(1);
       }
     }
   }
   return 0;
 }