Switch SupportsUserData uses to use unique_ptr.

extensions/browser/blob_holder.cc

 // 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 "extensions/browser/blob_holder.h"
 
 #include <algorithm>
 #include <utility>
 
 #include "base/logging.h"
+#include "base/memory/ptr_util.h"
 #include "content/public/browser/blob_handle.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/render_process_host.h"
 #include "extensions/browser/bad_message.h"
 
 namespace extensions {
 
 namespace {
 
 // Address to this variable used as the user data key.
 const int kBlobHolderUserDataKey = 0;
 }
 
 // static
 BlobHolder* BlobHolder::FromRenderProcessHost(
     content::RenderProcessHost* render_process_host) {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
   DCHECK(render_process_host);
   BlobHolder* existing = static_cast<BlobHolder*>(
       render_process_host->GetUserData(&kBlobHolderUserDataKey));
 
   if (existing)
     return existing;
 
   BlobHolder* new_instance = new BlobHolder(render_process_host);
-  render_process_host->SetUserData(&kBlobHolderUserDataKey, new_instance);
+  render_process_host->SetUserData(&kBlobHolderUserDataKey,
+                                   base::WrapUnique(new_instance));
   return new_instance;
 }
 
 BlobHolder::~BlobHolder() {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
 }
 
 void BlobHolder::HoldBlobReference(std::unique_ptr<content::BlobHandle> blob) {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
   DCHECK(!ContainsBlobHandle(blob.get()));
@@ skipping 31 matching lines @@
     } else {
       DLOG(ERROR) << "Tried to release a Blob we don't have ownership to."
                   << "UUID: " << *uuid_it;
       bad_message::ReceivedBadMessage(render_process_host_,
                                       bad_message::BH_BLOB_NOT_OWNED);
     }
   }
 }
 
 }  // namespace extensions