Remove support for special "sign in process" state.

chrome/renderer/extensions/renderer_permissions_policy_delegate.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 "chrome/renderer/extensions/renderer_permissions_policy_delegate.h"
 
-#include "base/command_line.h"
-#include "chrome/common/chrome_switches.h"
 #include "chrome/common/extensions/extension_constants.h"
 #include "extensions/common/constants.h"
 #include "extensions/common/extensions_client.h"
 #include "extensions/common/manifest_constants.h"
 #include "extensions/common/switches.h"
 #include "extensions/renderer/dispatcher.h"
 
 namespace extensions {
 
 namespace errors = manifest_errors;
@@ skipping 13 matching lines @@
     int tab_id,
     int process_id,
     std::string* error) {
   const ExtensionsClient::ScriptingWhitelist& whitelist =
       ExtensionsClient::Get()->GetScriptingWhitelist();
   if (std::find(whitelist.begin(), whitelist.end(), extension->id()) !=
       whitelist.end()) {
     return true;
   }
 
-  base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
-  if (command_line->HasSwitch(::switches::kSigninProcess)) {
-    if (error)
-      *error = errors::kCannotScriptSigninPage;
-    return false;
-  }
-
   if (dispatcher_->IsExtensionActive(kWebStoreAppId)) {
     if (error)
       *error = errors::kCannotScriptGallery;
     return false;
   }
 
   return true;
 }
 
 }  // namespace extensions