Re-write many calls to WrapUnique() with MakeUnique()

ios/web/webui/url_data_manager_ios_backend.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.
 
 #include "ios/web/webui/url_data_manager_ios_backend.h"
 
 #include <set>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 383 matching lines @@
        i != data_sources_.end(); ++i) {
     i->second->backend_ = NULL;
   }
   data_sources_.clear();
 }
 
 // static
 std::unique_ptr<net::URLRequestJobFactory::ProtocolHandler>
 URLDataManagerIOSBackend::CreateProtocolHandler(BrowserState* browser_state) {
   DCHECK(browser_state);
-  return base::WrapUnique(new ChromeProtocolHandler(
-      browser_state, browser_state->IsOffTheRecord()));
+  return base::MakeUnique<ChromeProtocolHandler>(
+      browser_state, browser_state->IsOffTheRecord());
 }
 
 void URLDataManagerIOSBackend::AddDataSource(URLDataSourceIOSImpl* source) {
   DCHECK_CURRENTLY_ON(WebThread::IO);
   DataSourceMap::iterator i = data_sources_.find(source->source_name());
   if (i != data_sources_.end()) {
     if (!source->source()->ShouldReplaceExistingSource())
       return;
     i->second->backend_ = NULL;
   }
@@ skipping 100 matching lines @@
   // Forward this data on to the pending net::URLRequest, if it exists.
   PendingRequestMap::iterator i = pending_requests_.find(request_id);
   if (i != pending_requests_.end()) {
     URLRequestChromeJob* job(i->second);
     pending_requests_.erase(i);
     job->DataAvailable(bytes);
   }
 }
 
 }  // namespace web