Refactoring the SysInfoProvider.

chrome/browser/chromeos/system_logs/system_logs_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/system_logs/system_logs_fetcher.h"
+
+#include "base/bind.h"
+#include "base/bind_helpers.h"
+#include "chrome/browser/chromeos/system_logs/commandline_log_source.h"
+#include "chrome/browser/chromeos/system_logs/debugd_log_source.h"
+#include "chrome/browser/chromeos/system_logs/memorydetails_log_source.h"
+#include "chrome/browser/chromeos/system_logs/lsbrelease_log_source.h"
+#include "content/public/browser/browser_thread.h"
+
+using content::BrowserThread;
+
+namespace chromeos {
+
+SystemLogsFetcher::SystemLogsFetcher()
+    : response_(new SystemLogsResponse), num_pending_requests_(0),
+      ALLOW_THIS_IN_INITIALIZER_LIST(weak_ptr_factory_(this)) {
+
+  // Debug Daemon data source.
+  data_sources_.push_back(new DebugDaemonLogSource());
+
+  // Chrome data sources.
+  data_sources_.push_back(new CommandLineLogSource());
+  data_sources_.push_back(new LsbReleaseLogSource());
+  data_sources_.push_back(new MemoryDetailsLogSource());
+  num_pending_requests_ = data_sources_.size();
+}
+
+void SystemLogsFetcher::Fetch(const SysLogsFetcherCallback& request) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+
+  request_ = request;
+  SysLogsDataSources::iterator it;
+  for (it = data_sources_.begin(); it != data_sources_.end(); ++it) {
+    (*it)->Fetch(base::Bind(&SystemLogsFetcher::AddData,
+                            weak_ptr_factory_.GetWeakPtr()));
+  }
+}
+
+void SystemLogsFetcher::AddData(SystemLogsResponse* response) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+
+  for (SystemLogsResponse::iterator it = response->begin();
+       it != response->end();
+       ++it) {
+    (*response_)[it->first] = it->second;
+  }
+  delete response;

[satorux1, 2012/08/13 19:33:36]

oh i see. so the response is deleted here. as mentioned elsewhere, it'd be
probably nicer to take scoped_ptr<SystemLogsResponse> instead.

Using base::Owned() in the client code is also an option.

[tudalex(Chromium), 2012/08/14 03:24:00]

Done.

+
+  if (--num_pending_requests_)

[satorux1, 2012/08/13 19:33:36]

this is hard to read. please do

--num_pending_requests;
if (num_pending_requests_ > 0)
  return;

[tudalex(Chromium), 2012/08/14 03:24:00]

Done.

+    return;
+
+
+  for (SysLogsDataSources::iterator it = data_sources_.begin();

[satorux1, 2012/08/13 19:33:36]

Please use ScopedVector for data_sources_ instead of deleting contents in this
way.

[tudalex(Chromium), 2012/08/14 03:24:00]

Done.

+       it != data_sources_.end();
+       ++it) {
+    delete *it;
+  }
+  request_.Run(response_);
+  BrowserThread::DeleteSoon(BrowserThread::UI, FROM_HERE, this);
+}
+
+}  // namespace chromeos
+