[HttpCache] Store some memcache info to memory dumps for debugging

base/trace_event/memory_infra_background_whitelist.cc

 // 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.
 
 #include "base/trace_event/memory_infra_background_whitelist.h"
 
 #include <ctype.h>
 #include <string.h>
 
 #include <string>
@@ skipping 53 matching lines @@
     "malloc/metadata_fragmentation_caches",
     "net/http_network_session_0x?",
     "net/http_network_session_0x?/quic_stream_factory",
     "net/http_network_session_0x?/socket_pool",
     "net/http_network_session_0x?/spdy_session_pool",
     "net/http_network_session_0x?/stream_factory",
     "net/sdch_manager_0x?",
     "net/ssl_session_cache",
     "net/url_request_context_0x?",
     "net/url_request_context_0x?/http_cache",
+    "net/url_request_context_0x?/http_cache/memory_backend",
+    "net/url_request_context_0x?/http_cache/simple_backend",
     "net/url_request_context_0x?/http_network_session",
     "net/url_request_context_0x?/sdch_manager",
     "web_cache/Image_resources",
     "web_cache/CSS stylesheet_resources",
     "web_cache/Script_resources",
     "web_cache/XSL stylesheet_resources",
     "web_cache/Font_resources",
     "web_cache/Other_resources",
     "partition_alloc/allocated_objects",
     "partition_alloc/partitions",
@@ skipping 105 matching lines @@
 void SetDumpProviderWhitelistForTesting(const char* const* list) {
   g_dump_provider_whitelist = list;
 }
 
 void SetAllocatorDumpNameWhitelistForTesting(const char* const* list) {
   g_allocator_dump_name_whitelist = list;
 }
 
 }  // namespace trace_event
 }  // namespace base