Evict non-secure cookies less agressively.

net/cookies/cookie_monster.h

Index: net/cookies/cookie_monster.h
diff --git a/net/cookies/cookie_monster.h b/net/cookies/cookie_monster.h
index 0ad3c94ddf6bb06df89ecad8d46cd2e522ca4028..69971373e80e1e71c08ac733de50007351557074 100644
--- a/net/cookies/cookie_monster.h
+++ b/net/cookies/cookie_monster.h
@@ -129,9 +129,9 @@ class NET_EXPORT CookieMonster : public CookieStore {
   static const size_t kPurgeCookies;
 
   // Quota for cookies with {low, medium, high} priorities within a domain.
-  static const size_t kDomainCookiesQuotaLow;
-  static const size_t kDomainCookiesQuotaMedium;
-  static const size_t kDomainCookiesQuotaHigh;
+  static const float kDomainCookiesQuotaLow;

[jww, 2016/02/18 01:05:19]

I think an explanation of this being a float is needed in the comment, esp.
because it's called a "quota" which I would normally expect to be an integer
limit. In practice, I think this is more of a "proportional limit" or something,
but as long as the comment explains it, we're probably good.

+  static const float kDomainCookiesQuotaMedium;
+  static const float kDomainCookiesQuotaHigh;
 
   // The store passed in should not have had Init() called on it yet. This
   // class will take care of initializing it. The backing store is NOT owned by
@@ -375,6 +375,8 @@ class NET_EXPORT CookieMonster : public CookieStore {
     COOKIE_DELETE_EQUIVALENT_LAST_ENTRY
   };
 
+  enum GCType { GC_NONSECURE, GC_SECURE };
+
   // The strategy for fetching cookies. Controlled by Finch experiment.
   enum FetchStrategy {
     // Fetches all cookies only when they're needed.
@@ -591,6 +593,12 @@ class NET_EXPORT CookieMonster : public CookieStore {
                                              size_t purge_goal,
                                              CookieItVector cookie_its);
 
+  size_t GarbageCollectNumFromRangeWithQuota(const base::Time& current,
+                                             const base::Time& safe_date,
+                                             size_t purge_goal,
+                                             CookieItVector::iterator* it_bdd,
+                                             GCType type);
+
   // Find the key (for lookup in cookies_) based on the given domain.
   // See comment on keys before the CookieMap typedef.
   std::string GetKey(const std::string& domain) const;