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

google_apis/gcm/engine/unregistration_request.cc

Index: google_apis/gcm/engine/unregistration_request.cc
diff --git a/google_apis/gcm/engine/unregistration_request.cc b/google_apis/gcm/engine/unregistration_request.cc
index 7272fc70bdfd290f80c09d49850f3079c2590035..9b337786f3e8a9c985fffd4206e242eeeb6566de 100644
--- a/google_apis/gcm/engine/unregistration_request.cc
+++ b/google_apis/gcm/engine/unregistration_request.cc
@@ -133,8 +133,8 @@ void UnregistrationRequest::Start() {
   DCHECK(request_info_.security_token != 0UL);
   DCHECK(!url_fetcher_.get());
 
-  url_fetcher_.reset(net::URLFetcher::Create(
-      registration_url_, net::URLFetcher::POST, this));
+  url_fetcher_ =
+      net::URLFetcher::Create(registration_url_, net::URLFetcher::POST, this);
   url_fetcher_->SetRequestContext(request_context_getter_.get());
 
   std::string android_id = base::Uint64ToString(request_info_.android_id);