Remove support for special "sign in process" state.

chrome/renderer/extensions/renderer_permissions_policy_delegate.cc

Index: chrome/renderer/extensions/renderer_permissions_policy_delegate.cc
diff --git a/chrome/renderer/extensions/renderer_permissions_policy_delegate.cc b/chrome/renderer/extensions/renderer_permissions_policy_delegate.cc
index 5e046cd989bef634a28405300f515f055c12b52b..dabf649a49360e9b069f6e05c13927d38df8e013 100644
--- a/chrome/renderer/extensions/renderer_permissions_policy_delegate.cc
+++ b/chrome/renderer/extensions/renderer_permissions_policy_delegate.cc
@@ -4,8 +4,6 @@
 
 #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"
@@ -39,13 +37,6 @@ bool RendererPermissionsPolicyDelegate::CanExecuteScriptOnPage(
     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;