Inject JSON parsing in WebResource as a callback rather than inheritance

chrome/browser/plugins/plugins_resource_service.cc

 // Copyright 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 "chrome/browser/plugins/plugins_resource_service.h"
 
+#include "base/bind.h"
 #include "base/command_line.h"
 #include "base/prefs/pref_registry_simple.h"
 #include "base/prefs/pref_service.h"
+#include "chrome/browser/browser_process.h"
 #include "chrome/browser/plugins/plugin_finder.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/pref_names.h"
+#include "components/safe_json/safe_json_parser.h"
 #include "url/gurl.h"
 
 namespace {
 
 // Delay on first fetch so we don't interfere with startup.
 const int kStartResourceFetchDelayMs = 60 * 1000;
 
 // Delay between calls to update the cache 1 day and 2 minutes in testing mode.
 const int kCacheUpdateDelayMs = 24 * 60 * 60 * 1000;
 
@@ skipping 11 matching lines @@
 #else
 #error Unknown platform
 #endif
 
   return GURL(kPluginsServerUrl + filename);
 }
 
 }  // namespace
 
 PluginsResourceService::PluginsResourceService(PrefService* local_state)
-    : ChromeWebResourceService(local_state,
-                               GetPluginsServerURL(),
-                               false,
-                               prefs::kPluginsResourceCacheUpdate,
-                               kStartResourceFetchDelayMs,
-                               kCacheUpdateDelayMs) {
-}
+    : web_resource::WebResourceService(
+          local_state,
+          GetPluginsServerURL(),
+          std::string(),
+          prefs::kPluginsResourceCacheUpdate,
+          kStartResourceFetchDelayMs,
+          kCacheUpdateDelayMs,
+          g_browser_process->system_request_context(),
+          switches::kDisableBackgroundNetworking,
+          base::Bind(safe_json::SafeJsonParser::Parse)) {}
 
 void PluginsResourceService::Init() {
   const base::DictionaryValue* metadata =
       prefs_->GetDictionary(prefs::kPluginsMetadata);
   PluginFinder::GetInstance()->ReinitializePlugins(metadata);
   StartAfterDelay();
 }
 
 PluginsResourceService::~PluginsResourceService() {
 }
 
 // static
 void PluginsResourceService::RegisterPrefs(PrefRegistrySimple* registry) {
   registry->RegisterDictionaryPref(prefs::kPluginsMetadata,
                                    new base::DictionaryValue());
   registry->RegisterStringPref(prefs::kPluginsResourceCacheUpdate, "0");
 }
 
 void PluginsResourceService::Unpack(const base::DictionaryValue& parsed_json) {
   prefs_->Set(prefs::kPluginsMetadata, parsed_json);
   PluginFinder::GetInstance()->ReinitializePlugins(&parsed_json);
 }