Add browserAction.enable/disable as alias for pageAction.show/hide.

chrome/browser/extensions/api/extension_action/extension_actions_api.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 "chrome/browser/extensions/api/extension_action/extension_actions_api.h"
 
 #include <string>
 
 #include "base/string_number_conversions.h"
 #include "base/string_piece.h"
@@ skipping 73 matching lines @@
               CHECK(tab_id_value->GetAsInteger(&tab_id_));
               break;
             default:
               // Boom.
               EXTENSION_FUNCTION_VALIDATE(false);
           }
         }
         break;
       }
 
+      case Value::TYPE_NULL:
+        // The tabId might be an optional argument.
+        break;
+
       default:
         EXTENSION_FUNCTION_VALIDATE(false);
     }
   }
 
   // Find the TabContents that contains this tab id if one is required.
   if (tab_id_ == ExtensionAction::kDefaultTabId) {
     EXTENSION_FUNCTION_VALIDATE(GetExtension()->browser_action());
   } else {
     ExtensionTabUtil::GetTabById(
@@ skipping 200 matching lines @@
 bool ExtensionActionGetBadgeBackgroundColorFunction::RunExtensionAction() {
   ListValue* list = new ListValue();
   SkColor color = extension_action_->GetBadgeBackgroundColor(tab_id_);
   list->Append(Value::CreateIntegerValue(SkColorGetR(color)));
   list->Append(Value::CreateIntegerValue(SkColorGetG(color)));
   list->Append(Value::CreateIntegerValue(SkColorGetB(color)));
   list->Append(Value::CreateIntegerValue(SkColorGetA(color)));
   SetResult(list);
   return true;
 }