Only commit cookie changes in prerenders after a prerender is shown

Will create a PrerenderCookieStore for each prerender, retaining all cookie
operations of a prerender until the prerender is shown to the user.
Forces prerenders to be in a new render process by themselves for this to work.
This is a resubmission of https://codereview.chromium.org/233353003, which had
to be reverted due to build breaks. See LGTM's there.
BUG=371003
TBR=jam@chromium.org

Review URL: https://codereview.chromium.org/280403002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@270049 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 9 insertions, 0 deletions

diff --git a/net/cookies/canonical_cookie.h b/net/cookies/canonical_cookie.h
index a78eece..a556740 100644
--- a/net/cookies/canonical_cookie.h
+++ b/net/cookies/canonical_cookie.h
@@ -125,6 +125,9 @@ class NET_EXPORT CanonicalCookie {
 
   std::string DebugString() const;
 
+  // Returns a duplicate of this cookie.
+  CanonicalCookie* Duplicate();
+
   // Returns the cookie source when cookies are set for |url|. This function
   // is public for unit test purposes only.
   static std::string GetCookieSourceFromURL(const GURL& url);
@@ -134,6 +137,9 @@ class NET_EXPORT CanonicalCookie {
                                     const base::Time& server_time);
 
  private:
+  // NOTE: When any new members are added below, the implementation of
+  // Duplicate() must be updated to copy the new member accordingly.
+
   // The source member of a canonical cookie is the origin of the URL that tried
   // to set this cookie, minus the port number if any.  This field is not
   // persistent though; its only used in the in-tab cookies dialog to show the
@@ -153,6 +159,9 @@ class NET_EXPORT CanonicalCookie {
   bool secure_;
   bool httponly_;
   CookiePriority priority_;
+  // NOTE: When any new members are added above this comment, the
+  // implementation of Duplicate() must be updated to copy the new member
+  // accordingly.
 };
 
 typedef std::vector<CanonicalCookie> CookieList;