[WeakMemoryCache] Remove dead/live distinction of Resource outside core/fetch

components/web_cache/public/interfaces/web_cache.mojom

 // Copyright 2016 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.
 
 module web_cache.mojom;
 
 interface WebCache {
   // Set cache capacity values.
-  SetCacheCapacities(uint64 min_dead_capacity,
-                     uint64 max_dead_capacity,
-                     uint64 capacity);
+  SetCacheCapacity(uint64 capacity);
   // Clear cache.
   ClearCache(bool on_navigation);
 };