Move chromeos code to namespace chromeos.

BUG=none
TEST=none
Review URL: http://codereview.chromium.org/341044

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@30541 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 82 insertions, 0 deletions

diff --git a/chrome/browser/chromeos/version_loader.cc b/chrome/browser/chromeos/version_loader.cc
new file mode 100644
index 0000000..9475205
--- /dev/null
+++ b/chrome/browser/chromeos/version_loader.cc
@@ -0,0 +1,82 @@
+// Copyright (c) 2009 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/version_loader.h"
+
+#include <vector>
+
+#include "base/file_path.h"
+#include "base/file_util.h"
+#include "base/message_loop.h"
+#include "base/string_util.h"
+#include "base/thread.h"
+#include "chrome/browser/browser_process.h"
+
+namespace chromeos {
+
+// Beginning of line we look for that gives version number.
+static const char kPrefix[] = "CHROMEOS_RELEASE_DESCRIPTION=";
+
+// File to look for version number in.
+static const char kPath[] = "/etc/lsb-release";
+
+VersionLoader::VersionLoader() : backend_(new Backend()) {
+}
+
+VersionLoader::Handle VersionLoader::GetVersion(
+    CancelableRequestConsumerBase* consumer,
+    VersionLoader::GetVersionCallback* callback) {
+  if (!g_browser_process->file_thread()) {
+    // This should only happen if Chrome is shutting down, so we don't do
+    // anything.
+    return 0;
+  }
+
+  scoped_refptr<CancelableRequest<GetVersionCallback> > request(
+      new CancelableRequest<GetVersionCallback>(callback));
+  AddRequest(request, consumer);
+
+  g_browser_process->file_thread()->message_loop()->PostTask(
+      FROM_HERE,
+      NewRunnableMethod(backend_.get(), &Backend::GetVersion, request));
+  return request->handle();
+}
+
+// static
+std::string VersionLoader::ParseVersion(const std::string& contents) {
+  // The file contains lines such as:
+  // XXX=YYY
+  // AAA=ZZZ
+  // Split the lines and look for the one that starts with kPrefix. The version
+  // file is small, which is why we don't try and be tricky.
+  std::vector<std::string> lines;
+  SplitString(contents, '\n', &lines);
+  for (size_t i = 0; i < lines.size(); ++i) {
+    if (StartsWithASCII(lines[i], kPrefix, false)) {
+      std::string version = lines[i].substr(std::string(kPrefix).size());
+      if (version.size() > 1 && version[0] == '"' &&
+          version[version.size() - 1] == '"') {
+        // Trim trailing and leading quotes.
+        version = version.substr(1, version.size() - 2);
+      }
+      return version;
+    }
+  }
+  return std::string();
+}
+
+void VersionLoader::Backend::GetVersion(
+    scoped_refptr<GetVersionRequest> request) {
+  if (request->canceled())
+    return;
+
+  std::string version;
+  std::string contents;
+  if (file_util::ReadFileToString(FilePath(kPath), &contents))
+    version = ParseVersion(contents);
+  request->ForwardResult(GetVersionCallback::TupleType(request->handle(),
+                                                       version));
+}
+
+}  // namespace chromeos