Add AffiliationFetcher to fetch authoritative affiliation information regarding facets.

components/password_manager/core/browser/affiliation_utils.cc

Index: components/password_manager/core/browser/affiliation_utils.cc
diff --git a/components/password_manager/core/browser/affiliation_utils.cc b/components/password_manager/core/browser/affiliation_utils.cc
new file mode 100644
index 0000000000000000000000000000000000000000..a1f5eeb4c8715c0b3e5d76420e909d253bbeb8f0
--- /dev/null
+++ b/components/password_manager/core/browser/affiliation_utils.cc
@@ -0,0 +1,60 @@
+// Copyright 2014 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 "components/password_manager/core/browser/affiliation_utils.h"
+
+#include "base/strings/string_util.h"
+#include "url/gurl.h"
+#include "url/third_party/mozilla/url_parse.h"
+
+namespace password_manager {
+
+const char kAndroidAppScheme[] = "android";
+
+bool IsValidFacetURI(const std::string& uri) {
+  return IsValidWebFacetURI(uri) || IsValidAndroidFacetURI(uri);
+}
+
+bool IsValidWebFacetURI(const std::string& uri) {
+  url::Parsed url_parsed;
+  url::ParseStandardURL(uri.c_str(), uri.size(), &url_parsed);
+  return url_parsed.scheme.is_nonempty() &&
+         LowerCaseEqualsASCII(&uri[url_parsed.scheme.begin],
+                              &uri[url_parsed.scheme.end()],
+                              url::kHttpsScheme) &&
+         !url_parsed.username.is_valid() && !url_parsed.password.is_valid() &&
+         url_parsed.host.is_nonempty() && url_parsed.path.is_nonempty() &&
+         url_parsed.path.len == 1 && uri[url_parsed.path.begin] == '/' &&
+         !url_parsed.query.is_valid() && !url_parsed.ref.is_valid();
+}
+
+bool IsValidAndroidFacetURI(const std::string& uri) {
+  // Treat URIs with the "android" scheme as standard URLs, so the APK hash will
+  // be treated as a username.
+  url::Parsed url_parsed;
+  url::ParseStandardURL(uri.c_str(), uri.size(), &url_parsed);
+  return url_parsed.scheme.is_nonempty() &&
+         LowerCaseEqualsASCII(&uri[url_parsed.scheme.begin],
+                              &uri[url_parsed.scheme.end()],
+                              kAndroidAppScheme) &&
+         url_parsed.username.is_nonempty() && !url_parsed.password.is_valid() &&
+         url_parsed.host.is_nonempty() && !url_parsed.port.is_valid() &&
+         url_parsed.path.is_nonempty() && url_parsed.path.len == 1 &&
+         uri[url_parsed.path.begin] == '/' && !url_parsed.query.is_valid() &&
+         !url_parsed.ref.is_valid();
+}
+
+bool AreEquivalenceClassesEqual(const AffiliatedFacets& a,
+                                const AffiliatedFacets& b) {
+  if (a.size() != b.size())
+    return false;
+
+  std::vector<std::string> a_sorted(a.begin(), a.end());
+  std::vector<std::string> b_sorted(b.begin(), b.end());
+  std::sort(a_sorted.begin(), a_sorted.end());
+  std::sort(b_sorted.begin(), b_sorted.end());
+  return std::equal(a_sorted.begin(), a_sorted.end(), b_sorted.begin());
+}
+
+}  // namespace password_manager