Add cookie prefix metrics

net/cookies/canonical_cookie.h

 // 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.
 
 #ifndef NET_COOKIES_CANONICAL_COOKIE_H_
 #define NET_COOKIES_CANONICAL_COOKIE_H_
 
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
+#include "base/gtest_prod_util.h"
 #include "base/time/time.h"
 #include "net/base/net_export.h"
 #include "net/cookies/cookie_constants.h"
 #include "net/cookies/cookie_options.h"
 
 class GURL;
 
 namespace net {
 
 class ParsedCookie;
@@ skipping 117 matching lines @@
   // domain and path. In particular, two equivalent cookies (see IsEquivalent())
   // are identical for PartialCompare().
   bool PartialCompare(const CanonicalCookie& other) const;
 
   // Returns true if the cookie is less than |other|, considering all fields.
   // FullCompare() is consistent with PartialCompare(): cookies sorted using
   // FullCompare() are also sorted with respect to PartialCompare().
   bool FullCompare(const CanonicalCookie& other) const;
 
  private:
+  FRIEND_TEST_ALL_PREFIXES(CanonicalCookiePrefixHistogramTest, TestHistograms);
+
+  // The special cookie prefixes as defined in
+  // https://tools.ietf.org/html/draft-west-cookie-prefixes
+  //
+  // This enum is being histogrammed; do not reorder or remove values.
+  enum CookiePrefix {
+    COOKIE_PREFIX_NONE = 0,
+    COOKIE_PREFIX_SECURE,
+    COOKIE_PREFIX_HOST,
+    COOKIE_PREFIX_LAST
+  };
+
+  // Returns the CookiePrefix (or COOKIE_PREFIX_NONE if none) that
+  // applies to the given cookie |name|.
+  static CookiePrefix GetCookiePrefix(const std::string& name);
+  // Records histograms to measure how often cookie prefixes appear in
+  // the wild and how often they would be blocked.
+  static void RecordCookiePrefixMetrics(CookiePrefix prefix,
+                                        bool is_cookie_valid);
+  // Returns true if a prefixed cookie does not violate any of the rules
+  // for that cookie.
+  static bool IsCookiePrefixValid(CookiePrefix prefix,
+                                  const GURL& url,
+                                  const ParsedCookie& parsed_cookie);
+
   // The source member of a canonical cookie is the origin of the URL that tried
   // to set this cookie.  This field is not persistent though; its only used in
   // the in-tab cookies dialog to show the user the source URL. This is used for
   // both allowed and blocked cookies.
   // When a CanonicalCookie is constructed from the backing store (common case)
   // this field will be null.  CanonicalCookie consumers should not rely on
   // this field unless they guarantee that the creator of those
   // CanonicalCookies properly initialized the field.
   GURL source_;
   std::string name_;
   std::string value_;
   std::string domain_;
   std::string path_;
   base::Time creation_date_;
   base::Time expiry_date_;
   base::Time last_access_date_;
   bool secure_;
   bool httponly_;
   bool first_party_only_;
   CookiePriority priority_;
 };
 
 typedef std::vector<CanonicalCookie> CookieList;
 
 }  // namespace net
 
 #endif  // NET_COOKIES_CANONICAL_COOKIE_H_