Expand net::CookieStore::ChangeCause::EXPLICIT for debugging.

net/cookies/cookie_store.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.
 
 // Brought to you by number 42.
 
 #ifndef NET_COOKIES_COOKIE_STORE_H_
 #define NET_COOKIES_COOKIE_STORE_H_
 
 #include <memory>
@@ skipping 18 matching lines @@
 // All async functions may either invoke the callback asynchronously, or they
 // may be invoked immediately (prior to return of the asynchronous function).
 // Destroying the CookieStore will cancel pending async callbacks.
 class NET_EXPORT CookieStore {
  public:
   // The publicly relevant reasons a cookie might be changed.
   enum class ChangeCause {
     // The cookie was inserted.
     INSERTED,
     // The cookie was changed directly by a consumer's action.
-    EXPLICIT,
+    // The following enum values all have the same meaning, but are being used
+    // to track down where a bug came from.
+    // TODO(nharper): Remove all but one of these and rename to EXPLICIT once
+    // the one of interest has been found.
+    EXPLICIT_DELETE,
+    EXPLICIT_DUPLICATE_IN_BACKING_STORE,
+    EXPLICIT_DONT_RECORD,
+    EXPLICIT_LAST_ENTRY,
     // The cookie was deleted, but no more details are known.
     UNKNOWN_DELETION,
     // The cookie was automatically removed due to an insert operation that
     // overwrote it.
     OVERWRITE,
     // The cookie was automatically removed as it expired.
     EXPIRED,
     // The cookie was automatically evicted during garbage collection.
     EVICTED,
     // The cookie was overwritten with an already-expired expiration date.
@@ skipping 186 matching lines @@
   int GetChannelIDServiceID();
 
  protected:
   CookieStore();
   int channel_id_service_id_;
 };
 
 }  // namespace net
 
 #endif  // NET_COOKIES_COOKIE_STORE_H_