Refactoring the SysInfoProvider.

chrome/browser/chromeos/syslogs/syslogs_fetcher.cc

+// Copyright (c) 2012 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 "chrome/browser/chromeos/syslogs/syslogs_fetcher.h"
+
+#include "base/bind.h"
+#include "base/bind_helpers.h"
+#include "content/public/browser/browser_thread.h"
+
+
+using content::BrowserThread;
+
+namespace chromeos {
+
+
+SysLogsFetcher::SysLogsFetcher(SysLogsDataSources backends)
+    : data_sources_(backends), response_(new SysLogsResponse),
+      responses_(backends.size()),
+      ALLOW_THIS_IN_INITIALIZER_LIST(weak_ptr_factory_(this)) {}
+
+void SysLogsFetcher::Fetch(const SysLogsFetcherCallback& request) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  request_ = request;
+  SysLogsDataSources::iterator it;
+  responses_ = data_sources_.size();
+  for (it = data_sources_.begin(); it != data_sources_.end(); ++it) {
+    (*it)->Fetch(base::Bind(&SysLogsFetcher::AddData,
+                              weak_ptr_factory_.GetWeakPtr()));
+  }
+}
+
+void SysLogsFetcher::AddData(SysLogsResponse* data) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  SysLogsResponse::iterator it;
+  for (it = data->begin(); it != data->end(); ++it){
+    (*response_)[it->first] = it->second;
+  }
+  delete data;
+
+  if (--responses_)
+    return;
+
+  SysLogsDataSources::iterator ds_it;
+  for (ds_it = data_sources_.begin(); ds_it != data_sources_.end(); ++ds_it) {
+    delete *ds_it;
+  }
+  request_.Run(response_);
+  BrowserThread::DeleteSoon(BrowserThread::UI, FROM_HERE, this);
+}
+
+}  // namespace chromeos
+