Extract ProcessManager from ExtensionSystem.

extensions/browser/event_router.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 "extensions/browser/event_router.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 662 matching lines @@
   if (!extension)
     return;
   event_router->IncrementInFlightEvents(browser_context, extension);
 }
 
 void EventRouter::IncrementInFlightEvents(BrowserContext* context,
                                           const Extension* extension) {
   // Only increment in-flight events if the lazy background page is active,
   // because that's the only time we'll get an ACK.
   if (BackgroundInfo::HasLazyBackgroundPage(extension)) {
-    ProcessManager* pm = ExtensionSystem::Get(context)->process_manager();
+    ProcessManager* pm = ProcessManager::Get(context);
     ExtensionHost* host = pm->GetBackgroundHostForExtension(extension->id());
     if (host)
       pm->IncrementLazyKeepaliveCount(extension);
   }
 }
 
 void EventRouter::OnEventAck(BrowserContext* context,
                              const std::string& extension_id) {
-  ProcessManager* pm = ExtensionSystem::Get(context)->process_manager();
+  ProcessManager* pm = ProcessManager::Get(context);
   ExtensionHost* host = pm->GetBackgroundHostForExtension(extension_id);
   // The event ACK is routed to the background host, so this should never be
   // NULL.
   CHECK(host);
   // TODO(mpcomplete): We should never get this message unless
   // HasLazyBackgroundPage is true. Find out why we're getting it anyway.
   if (host->extension() &&
       BackgroundInfo::HasLazyBackgroundPage(host->extension()))
     pm->DecrementLazyKeepaliveCount(host->extension());
 }
@@ skipping 110 matching lines @@
                                      const std::string& extension_id,
                                      const GURL& listener_url,
                                      content::BrowserContext* browser_context)
     : event_name(event_name),
       extension_id(extension_id),
       listener_url(listener_url),
       browser_context(browser_context) {
 }
 
 }  // namespace extensions