extensions: Remove chrome.webSocketProxyPrivate API

chrome/browser/chromeos/chrome_browser_main_chromeos.cc

Index: chrome/browser/chromeos/chrome_browser_main_chromeos.cc
diff --git a/chrome/browser/chromeos/chrome_browser_main_chromeos.cc b/chrome/browser/chromeos/chrome_browser_main_chromeos.cc
index d00b582ccfe959babc3b0da72f009cff5b53b204..e87caf6bcb041091ee9e21464330b4101cec6d7a 100644
--- a/chrome/browser/chromeos/chrome_browser_main_chromeos.cc
+++ b/chrome/browser/chromeos/chrome_browser_main_chromeos.cc
@@ -74,7 +74,6 @@
 #include "chrome/browser/chromeos/system/statistics_provider.h"
 #include "chrome/browser/chromeos/system_key_event_listener.h"
 #include "chrome/browser/chromeos/upgrade_detector_chromeos.h"
-#include "chrome/browser/chromeos/web_socket_proxy_controller.h"
 #include "chrome/browser/chromeos/xinput_hierarchy_changed_event_listener.h"
 #include "chrome/browser/defaults.h"
 #include "chrome/browser/metrics/metrics_service.h"
@@ -779,8 +778,6 @@ void ChromeBrowserMainPartsChromeos::PostMainMessageLoopRun() {
   imageburner::BurnManager::Shutdown();
   CrasAudioHandler::Shutdown();
 
-  WebSocketProxyController::Shutdown();
-
   // Let classes unregister themselves as observers of the ash::Shell singleton
   // before the shell is destroyed.
   user_activity_notifier_.reset();