Adding a command line flag to specify renderer process limit

content/browser/browser_main_loop.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 "content/browser/browser_main_loop.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
 #include "base/message_loop.h"
 #include "base/metrics/field_trial.h"
 #include "base/metrics/histogram.h"
+#include "base/string_number_conversions.h"
 #include "base/threading/thread_restrictions.h"
 #include "content/browser/browser_thread_impl.h"
 #include "content/browser/download/download_file_manager.h"
 #include "content/browser/download/save_file_manager.h"
 #include "content/browser/in_process_webkit/webkit_thread.h"
 #include "content/browser/plugin_service_impl.h"
 #include "content/browser/renderer_host/resource_dispatcher_host.h"
 #include "content/browser/trace_controller.h"
 #include "content/common/hi_res_timer_manager.h"
 #include "content/common/sandbox_policy.h"
 #include "content/public/browser/browser_main_parts.h"
 #include "content/public/browser/browser_shutdown.h"
 #include "content/public/browser/content_browser_client.h"
+#include "content/public/browser/render_process_host.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/common/main_function_params.h"
 #include "content/public/common/result_codes.h"
 #include "crypto/nss_util.h"
 #include "net/base/network_change_notifier.h"
 #include "net/base/ssl_config_service.h"
 #include "net/socket/client_socket_factory.h"
 #include "net/socket/tcp_client_socket.h"
 
 #if defined(OS_WIN)
@@ skipping 224 matching lines @@
   if (parsed_command_line_.HasSwitch(
           switches::kEnableDNSCertProvenanceChecking)) {
     net::SSLConfigService::EnableDNSCertProvenanceChecking();
   }
 
   // TODO(abarth): Should this move to InitializeNetworkOptions?  This doesn't
   // seem dependent on SSL initialization().
   if (parsed_command_line_.HasSwitch(switches::kEnableTcpFastOpen))
     net::set_tcp_fastopen_enabled(true);
 
+  if (parsed_command_line_.HasSwitch(switches::kRendererProcessLimit)) {
+    std::string limit_string = parsed_command_line_.GetSwitchValueASCII(
+        switches::kRendererProcessLimit);
+    size_t process_limit;
+    if (base::StringToSizeT(limit_string, &process_limit)) {
+      content::RenderProcessHost::SetMaxRendererProcessCount(process_limit);
+    }
+  }
+
   if (parts_.get())
     parts_->PostEarlyInitialization();
 }
 
 void BrowserMainLoop::MainMessageLoopStart() {
   if (parts_.get())
     parts_->PreMainMessageLoopStart();
 
 #if defined(OS_WIN)
   // If we're running tests (ui_task is non-null), then the ResourceBundle
@@ skipping 310 matching lines @@
     MessageLoopForUI::current()->PostTask(FROM_HERE, *parameters_.ui_task);
 
 #if defined(OS_MACOSX)
   MessageLoopForUI::current()->Run();
 #else
   MessageLoopForUI::current()->RunWithDispatcher(NULL);
 #endif
 }
 
 }  // namespace content