Prevent creating background pages for non-incognito profile in Guest mode

extensions/browser/process_manager.cc

 // Copyright 2013 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/process_manager.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/lazy_instance.h"
 #include "base/logging.h"
@@ skipping 230 matching lines @@
        iter != all_extension_views_.end(); ++iter) {
     result.insert(iter->first);
   }
   return result;
 }
 
 ExtensionHost* ProcessManager::CreateBackgroundHost(const Extension* extension,
                                                     const GURL& url) {
   // Hosted apps are taken care of from BackgroundContentsService. Ignore them
   // here.
-  if (extension->is_hosted_app())
+  if (extension->is_hosted_app() ||
+      !ExtensionsBrowserClient::Get()->
+          IsBackgroundPageAllowed(GetBrowserContext())) {
     return NULL;
+  }
 
   // Don't create multiple background hosts for an extension.
   if (ExtensionHost* host = GetBackgroundHostForExtension(extension->id()))
     return host;  // TODO(kalman): return NULL here? It might break things...
 
   ExtensionHost* host =
       new ExtensionHost(extension, GetSiteInstanceForURL(url), url,
                         VIEW_TYPE_EXTENSION_BACKGROUND_PAGE);
   host->CreateRenderViewSoon();
   OnBackgroundHostCreated(host);
@@ skipping 439 matching lines @@
   if (attached) {
     // Keep the lazy background page alive while it's being inspected.
     CancelSuspend(extension);
     IncrementLazyKeepaliveCount(extension);
   } else {
     DecrementLazyKeepaliveCount(extension);
   }
 }
 
 void ProcessManager::CreateBackgroundHostsForProfileStartup() {
-  if (startup_background_hosts_created_)
+  if (startup_background_hosts_created_ ||
+      !ExtensionsBrowserClient::Get()->
+          IsBackgroundPageAllowed(GetBrowserContext())) {
     return;
+  }
 
   ExtensionService* service = ExtensionSystem::GetForBrowserContext(
       GetBrowserContext())->extension_service();
   DCHECK(service);
   for (ExtensionSet::const_iterator extension = service->extensions()->begin();
        extension != service->extensions()->end(); ++extension) {
     CreateBackgroundHostForExtensionLoad(this, extension->get());
 
     RuntimeEventRouter::DispatchOnStartupEvent(GetBrowserContext(),
                                                (*extension)->id());
@@ skipping 140 matching lines @@
 }
 
 bool IncognitoProcessManager::IsIncognitoEnabled(const Extension* extension) {
   // Keep in sync with duplicate in extension_info_map.cc.
   ExtensionService* service = ExtensionSystem::GetForBrowserContext(
       GetBrowserContext())->extension_service();
   return extension_util::IsIncognitoEnabled(extension->id(), service);
 }
 
 }  // namespace extensions