Zygote most of the uses of the utility process on Linux

chrome/browser/web_resource/web_resource_service.cc

 // Copyright (c) 2011 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/web_resource/web_resource_service.h"
 
 #include "base/command_line.h"
 #include "base/file_path.h"
 #include "base/string_number_conversions.h"
 #include "base/string_util.h"
@@ skipping 176 matching lines @@
   void Cleanup() {
     if (got_response_)
       return;
 
     got_response_ = true;
     Release();
   }
 
   void StartProcessOnIOThread(BrowserThread::ID thread_id) {
     UtilityProcessHost* host = new UtilityProcessHost(this, thread_id);
+#if defined(OS_LINUX)
+    host->set_should_use_zygote(true);
+#endif
     // TODO(mrc): get proper file path when we start using web resources
     // that need to be unpacked.
     host->Send(new ChromeUtilityMsg_UnpackWebResource(json_data_));
   }
 
   scoped_refptr<WebResourceService> web_resource_service_;
 
   // Holds raw JSON string.
   std::string json_data_;
 
@@ skipping 87 matching lines @@
 }
 
 void WebResourceService::UpdateResourceCache(const std::string& json_data) {
   UnpackerClient* client = new UnpackerClient(this, json_data);
   client->Start();
 
   // Set cache update time in preferences.
   prefs_->SetString(last_update_time_pref_name_,
       base::DoubleToString(base::Time::Now().ToDoubleT()));
 }