Remove net-internals page for throttling, introduce flag for extension devs instead.

net/url_request/url_request_throttler_manager.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 "net/url_request/url_request_throttler_manager.h"
 
 #include "base/logging.h"
 #include "base/metrics/field_trial.h"
 #include "base/metrics/histogram.h"
 #include "base/string_util.h"
@@ skipping 131 matching lines @@
 }
 
 void URLRequestThrottlerManager::OnIPAddressChanged() {
   OnNetworkChange();
 }
 
 void URLRequestThrottlerManager::OnOnlineStateChanged(bool online) {
   OnNetworkChange();
 }
 
-// TODO(joi): Turn throttling on by default when appropriate.
 URLRequestThrottlerManager::URLRequestThrottlerManager()
     : requests_since_last_gc_(0),
-      enforce_throttling_(false),
+      enforce_throttling_(true),
       enable_thread_checks_(false),
       logged_for_localhost_disabled_(false),
       registered_from_thread_(base::kInvalidThreadId) {
   // Construction/destruction is on main thread (because BrowserMain
   // retrieves an instance to call InitializeOptions), but is from then on
   // used on I/O thread.
   DetachFromThread();
 
   url_id_replacements_.ClearPassword();
   url_id_replacements_.ClearUsername();
@@ skipping 67 matching lines @@
 void URLRequestThrottlerManager::OnNetworkChange() {
   // Remove all entries.  Any entries that in-flight requests have a reference
   // to will live until those requests end, and these entries may be
   // inconsistent with new entries for the same URLs, but since what we
   // want is a clean slate for the new connection state, this is OK.
   url_entries_.clear();
   requests_since_last_gc_ = 0;
 }
 
 }  // namespace net