Get URLRequestContext from the profile attached to the automation provider, not the default.

chrome/browser/automation/automation_provider.cc

Index: chrome/browser/automation/automation_provider.cc
===================================================================
--- chrome/browser/automation/automation_provider.cc	(revision 88522)
+++ chrome/browser/automation/automation_provider.cc	(working copy)
@@ -579,16 +579,7 @@
 
 void AutomationProvider::SetProxyConfig(const std::string& new_proxy_config) {
   net::URLRequestContextGetter* context_getter =
-      Profile::GetDefaultRequestContext();
-  if (!context_getter) {
-    FilePath user_data_dir;
-    PathService::Get(chrome::DIR_USER_DATA, &user_data_dir);
-    ProfileManager* profile_manager = g_browser_process->profile_manager();
-    DCHECK(profile_manager);
-    Profile* profile = profile_manager->GetDefaultProfile(user_data_dir);
-    DCHECK(profile);
-    context_getter = profile->GetRequestContext();
-  }
+      profile_->GetRequestContext();
   DCHECK(context_getter);
 
   BrowserThread::PostTask(