Extended: Add "system" URLRequestContext

chrome/browser/io_thread.cc

Index: chrome/browser/io_thread.cc
diff --git a/chrome/browser/io_thread.cc b/chrome/browser/io_thread.cc
index 16eec12acf16f964ed46ef42437dda50c64e1be5..756f59befc791a19a122a7110cff5fb1a5e9b8dd 100644
--- a/chrome/browser/io_thread.cc
+++ b/chrome/browser/io_thread.cc
@@ -23,6 +23,7 @@
 #include "chrome/browser/net/connect_interceptor.h"
 #include "chrome/browser/net/passive_log_collector.h"
 #include "chrome/browser/net/predictor_api.h"
+#include "chrome/browser/net/proxy_service_factory.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/net/raw_host_resolver_proc.h"
@@ -36,6 +37,7 @@
 #include "net/base/host_resolver_impl.h"
 #include "net/base/mapped_host_resolver.h"
 #include "net/base/net_util.h"
+#include "net/proxy/proxy_config_service.h"
 #include "net/http/http_auth_filter.h"
 #include "net/http/http_auth_handler_factory.h"
 #include "net/http/http_network_layer.h"
@@ -196,8 +198,64 @@ ConstructProxyScriptFetcherContext(IOThread::Globals* globals,
   return context;
 }
 
+scoped_refptr<net::URLRequestContext>
+ConstructSystemRequestContext(IOThread::Globals* globals,
+                              net::NetLog* net_log) {
+  scoped_refptr<net::URLRequestContext> context(new net::URLRequestContext);
+  context->set_net_log(net_log);
+  context->set_host_resolver(globals->host_resolver.get());
+  context->set_cert_verifier(globals->cert_verifier.get());
+  context->set_dnsrr_resolver(globals->dnsrr_resolver.get());
+  context->set_http_auth_handler_factory(
+      globals->http_auth_handler_factory.get());
+  context->set_proxy_service(globals->system_proxy_service.get());
+  context->set_http_transaction_factory(
+      globals->system_http_transaction_factory.get());
+  // In-memory cookie store.
+  context->set_cookie_store(new net::CookieMonster(NULL, NULL));
+  return context;
+}
+
 }  // namespace
 
+class SystemURLRequestContextGetter : public URLRequestContextGetter {
+ public:
+  explicit SystemURLRequestContextGetter(IOThread* io_thread);
+  virtual ~SystemURLRequestContextGetter();
+
+  // Implementation for UrlRequestContextGetter.
+  virtual net::URLRequestContext* GetURLRequestContext();
+  virtual scoped_refptr<base::MessageLoopProxy> GetIOMessageLoopProxy() const;
+
+ private:
+  IOThread* const io_thread_;  // Weak pointer, owned by BrowserProcess.
+  scoped_refptr<base::MessageLoopProxy> io_message_loop_proxy_;
+
+  base::debug::LeakTracker<SystemURLRequestContextGetter> leak_tracker_;
+};
+
+SystemURLRequestContextGetter::SystemURLRequestContextGetter(
+    IOThread* io_thread)
+    : io_thread_(io_thread),
+      io_message_loop_proxy_(io_thread->message_loop_proxy()) {
+}
+
+SystemURLRequestContextGetter::~SystemURLRequestContextGetter() {}
+
+net::URLRequestContext* SystemURLRequestContextGetter::GetURLRequestContext() {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+
+  if (!io_thread_->globals()->system_request_context)
+    io_thread_->InitSystemRequestContext();
+
+  return io_thread_->globals()->system_request_context;
+}
+
+scoped_refptr<base::MessageLoopProxy>
+SystemURLRequestContextGetter::GetIOMessageLoopProxy() const {
+  return io_message_loop_proxy_;
+}
+
 // The IOThread object must outlive any tasks posted to the IO thread before the
 // Quit task.
 DISABLE_RUNNABLE_METHOD_REFCOUNT(IOThread);
@@ -244,6 +302,12 @@ ChromeNetLog* IOThread::net_log() {
   return net_log_;
 }
 
+void IOThread::SetSystemProxyConfigService(
+    net::ProxyConfigService* system_proxy_config_service) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  system_proxy_config_service_.reset(system_proxy_config_service);
+}
+
 void IOThread::InitNetworkPredictor(
     bool prefetching_enabled,
     base::TimeDelta max_dns_queue_delay,
@@ -295,6 +359,20 @@ void IOThread::ChangedToOnTheRecord() {
           &IOThread::ChangedToOnTheRecordOnIOThread));
 }
 
+scoped_refptr<URLRequestContextGetter>
+IOThread::system_url_request_context_getter() {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  if (!system_url_request_context_getter_) {
+    // We DCHECK only the first time this function is called as the
+    // SystemURLRequestContextGetter will consume the stored value and reset
+    // the pointer to NULL.
+    DCHECK(system_proxy_config_service_.get());
+    system_url_request_context_getter_ =
+        new SystemURLRequestContextGetter(this);
+  }
+  return system_url_request_context_getter_;
+}
+
 void IOThread::Init() {
   // Though this thread is called the "IO" thread, it actually just routes
   // messages around; it shouldn't be allowed to perform any blocking disk I/O.
@@ -381,6 +459,8 @@ void IOThread::CleanUp() {
     getter->ReleaseURLRequestContext();
   }
 
+  system_url_request_context_getter_ = NULL;
+
   // Step 2: Release objects that the net::URLRequestContext could have been
   // pointing to.
 
@@ -407,6 +487,8 @@ void IOThread::CleanUp() {
     globals_->host_resolver.get()->GetAsHostResolverImpl()->Shutdown();
   }
 
+  system_proxy_config_service_.reset();
+
   delete globals_;
   globals_ = NULL;
 
@@ -424,6 +506,8 @@ void IOThread::CleanUpAfterMessageLoopDestruction() {
   // MessageLoop::DestructionObserver this check has to happen after CleanUp
   // (which runs before DestructionObservers).
   base::debug::LeakTracker<net::URLRequest>::CheckForLeaks();
+
+  base::debug::LeakTracker<SystemURLRequestContextGetter>::CheckForLeaks();
 }
 
 // static
@@ -519,3 +603,34 @@ void IOThread::ClearHostCache() {
       host_cache->clear();
   }
 }
+
+void IOThread::InitSystemRequestContext() {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+  DCHECK(!globals_->system_proxy_service);
+  DCHECK(system_proxy_config_service_.get());
+
+  const CommandLine& command_line = *CommandLine::ForCurrentProcess();
+  globals_->system_proxy_service =
+      ProxyServiceFactory::CreateProxyService(
+          net_log_,
+          globals_->proxy_script_fetcher_context,
+          system_proxy_config_service_.release(),
+          command_line);
+  net::HttpNetworkSession::Params system_params;
+  system_params.host_resolver = globals_->host_resolver.get();
+  system_params.cert_verifier = globals_->cert_verifier.get();
+  system_params.dnsrr_resolver = globals_->dnsrr_resolver.get();
+  system_params.dns_cert_checker = NULL;
+  system_params.ssl_host_info_factory = NULL;
+  system_params.proxy_service = globals_->system_proxy_service.get();
+  system_params.ssl_config_service = globals_->ssl_config_service.get();
+  system_params.http_auth_handler_factory =
+      globals_->http_auth_handler_factory.get();
+  system_params.network_delegate = &globals_->network_delegate;
+  system_params.net_log = net_log_;
+  globals_->system_http_transaction_factory.reset(
+      new net::HttpNetworkLayer(
+          new net::HttpNetworkSession(system_params)));
+  globals_->system_request_context =
+      ConstructSystemRequestContext(globals_, net_log_);
+}