memory coordinator: Add MemoryCoordinatorClient::OnPurgeMemory()

net/ssl/ssl_client_session_cache.cc

 // Copyright 2015 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.
 
 #include "net/ssl/ssl_client_session_cache.h"
 
 #include <utility>
 
 #include "base/memory/memory_coordinator_client_registry.h"
 #include "base/strings/stringprintf.h"
@@ skipping 159 matching lines @@
       break;
     case base::MemoryPressureListener::MEMORY_PRESSURE_LEVEL_MODERATE:
       FlushExpiredSessions();
       break;
     case base::MemoryPressureListener::MEMORY_PRESSURE_LEVEL_CRITICAL:
       Flush();
       break;
   }
 }
 
-void SSLClientSessionCache::OnMemoryStateChange(base::MemoryState state) {
-  // TODO(hajimehoshi): When the state changes, adjust the sizes of the caches
-  // to reduce the limits. SSLClientSessionCache doesn't have the ability to
-  // limit at present.
-  switch (state) {
-    case base::MemoryState::NORMAL:
-      break;
-    case base::MemoryState::THROTTLED:
-      Flush();
-      break;
-    case base::MemoryState::SUSPENDED:
-    // Note: Not supported at present. Fall through.
-    case base::MemoryState::UNKNOWN:
-      NOTREACHED();
-      break;
-  }
+void SSLClientSessionCache::OnPurgeMemory() {
+  Flush();
 }
 
 }  // namespace net