Make URLRequestThrottlerManager a member of URLRequestContext.

chrome/browser/profiles/profile_impl_io_data.cc

Index: chrome/browser/profiles/profile_impl_io_data.cc
diff --git a/chrome/browser/profiles/profile_impl_io_data.cc b/chrome/browser/profiles/profile_impl_io_data.cc
index f439146b3df176910d4f0f5bdc7206a5b3db837f..e9bc8aef89985e5178c9dc72fd3c4a1f26d9403b 100644
--- a/chrome/browser/profiles/profile_impl_io_data.cc
+++ b/chrome/browser/profiles/profile_impl_io_data.cc
@@ -29,6 +29,7 @@
 #include "net/ftp/ftp_network_layer.h"
 #include "net/http/http_cache.h"
 #include "net/url_request/url_request_job_factory.h"
+#include "net/url_request/url_request_throttler_manager.h"
 
 using content::BrowserThread;
 
@@ -308,6 +309,13 @@ void ProfileImplIOData::LazyInitializeInternal(
   media_request_context_->set_fraudulent_certificate_reporter(
       fraudulent_certificate_reporter());
 
+  main_context->set_throttler_manager(
+      io_thread_globals->throttler_manager.get());
+  media_request_context_->set_throttler_manager(
+      io_thread_globals->throttler_manager.get());
+  extensions_context->set_throttler_manager(
+      io_thread_globals->throttler_manager.get());
+
   main_context->set_proxy_service(proxy_service());
   media_request_context_->set_proxy_service(proxy_service());