Make URLRequestThrottlerManager a member of URLRequestContext.

net/url_request/url_request_http_job.cc

Index: net/url_request/url_request_http_job.cc
diff --git a/net/url_request/url_request_http_job.cc b/net/url_request/url_request_http_job.cc
index cb7a64d830447909cd2e9d37d08a72694a04d628..237c4b6e2728d48bd6fe5c5ecd5b2994f738e35a 100644
--- a/net/url_request/url_request_http_job.cc
+++ b/net/url_request/url_request_http_job.cc
@@ -176,7 +176,7 @@ URLRequestHttpJob::URLRequestHttpJob(URLRequest* request)
                      base::Unretained(this)))),
       read_in_progress_(false),
       transaction_(NULL),
-      throttling_entry_(URLRequestThrottlerManager::GetInstance()->
+      throttling_entry_(request->context()->throttler_manager()->
           RegisterRequestUrl(request->url())),
       sdch_dictionary_advertised_(false),
       sdch_test_activated_(false),
@@ -325,7 +325,7 @@ void URLRequestHttpJob::StartTransactionInternal() {
       // change (to throttle only requests originating from
       // extensions) gets into M19. Right after the M19 branch point,
       // I will sort this out in a more architecturally-sound way.
-      if (!URLRequestThrottlerManager::GetInstance()->enforce_throttling() ||
+      if (!request_->context()->throttler_manager()->enforce_throttling() ||
           request_->first_party_for_cookies().scheme() != "chrome-extension" ||
           !throttling_entry_->ShouldRejectRequest(request_info_.load_flags)) {
         rv = transaction_->Start(