importer: Cleanup ToolbarImporter code a little bit.

chrome/browser/importer/toolbar_importer_utils.cc

+// Copyright (c) 2011 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/importer/toolbar_importer_utils.h"
+
+#include <string>
+#include <vector>
+
+#include "base/string_split.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/common/net/url_request_context_getter.h"
+#include "googleurl/src/gurl.h"
+#include "net/base/cookie_store.h"
+
+namespace {
+const char kGoogleDomainUrl[] = "http://.google.com/";
+const char kGoogleDomainSecureCookieId[] = "SID=";
+const char kSplitStringToken = ';';
+}
+
+namespace toolbar_importer_utils {
+
+bool IsGoogleGAIACookieInstalled() {
+  net::CookieStore* store =
+      Profile::GetDefaultRequestContext()->GetCookieStore();
+  GURL url(kGoogleDomainUrl);
+  net::CookieOptions options;
+  options.set_include_httponly();  // The SID cookie might be httponly.
+  std::string cookies = store->GetCookiesWithOptions(url, options);
+  std::vector<std::string> cookie_list;
+  base::SplitString(cookies, kSplitStringToken, &cookie_list);
+  for (std::vector<std::string>::iterator current = cookie_list.begin();
+       current != cookie_list.end();
+       ++current) {
+    size_t position = (*current).find(kGoogleDomainSecureCookieId);
+    if (0 == position)
+      return true;
+  }
+  return false;
+}
+
+}  // namespace toolbar_importer_utils