memory coordinator: Add MemoryCoordinatorClient::OnPurgeMemory()

net/http/http_network_session.cc

 // 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.
 
 #include "net/http/http_network_session.h"
 
 #include <utility>
 
 #include "base/atomic_sequence_num.h"
 #include "base/compiler_specific.h"
@@ skipping 459 matching lines @@
   switch (memory_pressure_level) {
     case base::MemoryPressureListener::MEMORY_PRESSURE_LEVEL_NONE:
       break;
     case base::MemoryPressureListener::MEMORY_PRESSURE_LEVEL_MODERATE:
     case base::MemoryPressureListener::MEMORY_PRESSURE_LEVEL_CRITICAL:
       CloseIdleConnections();
       break;
   }
 }
 
-void HttpNetworkSession::OnMemoryStateChange(base::MemoryState state) {
-  // TODO(hajimehoshi): When the state changes, adjust the sizes of the caches
-  // to reduce the limits. HttpNetworkSession doesn't have the ability to limit
-  // at present.
-  switch (state) {
-    case base::MemoryState::NORMAL:
-      break;
-    case base::MemoryState::THROTTLED:
-      CloseIdleConnections();
-      break;
-    case base::MemoryState::SUSPENDED:
-    // Note: Not supported at present. Fall through.
-    case base::MemoryState::UNKNOWN:
-      NOTREACHED();
-      break;
-  }
+void HttpNetworkSession::OnPurgeMemory() {
+  CloseIdleConnections();
 }
 
 }  // namespace net