Adjust URLFetcher::Create API so that object is returned as scoped_ptr.

chrome/browser/extensions/blob_reader.cc

Index: chrome/browser/extensions/blob_reader.cc
diff --git a/chrome/browser/extensions/blob_reader.cc b/chrome/browser/extensions/blob_reader.cc
index bab8634de851fc9f357f8f07104a4f66df520f70..c8d4218cc6ad6eeb5ec2d7fe2d45ca04d8eb720b 100644
--- a/chrome/browser/extensions/blob_reader.cc
+++ b/chrome/browser/extensions/blob_reader.cc
@@ -28,9 +28,7 @@ BlobReader::BlobReader(Profile* profile,
     blob_url = GURL(std::string("blob:uuid/") + blob_uuid);
   }
   DCHECK(blob_url.is_valid());
-  fetcher_.reset(net::URLFetcher::Create(
-      blob_url, net::URLFetcher::GET,
-      this));
+  fetcher_ = net::URLFetcher::Create(blob_url, net::URLFetcher::GET, this);
   fetcher_->SetRequestContext(profile->GetRequestContext());
 }