[Extensions] DCHECK that ExtensionFunctions respond (and only once)

chrome/browser/extensions/api/declarative_content/set_icon_apitest.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/extension_action_manager.h"
 #include "chrome/browser/extensions/extension_apitest.h"
 #include "chrome/browser/extensions/extension_tab_util.h"
 #include "chrome/browser/extensions/test_extension_dir.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
 #include "chrome/common/extensions/features/feature_channel.h"
@@ skipping 53 matching lines @@
       "}\n"
       "\n"
       "var testEvent = chrome.declarativeContent.onPageChanged;\n"
       "\n"
       "testEvent.removeRules(undefined, function() {\n"
       "  testEvent.addRules([rule0], function() {\n"
       "    chrome.test.sendMessage(\"ready\", function(reply) {\n"
       "    })\n"
       "  });\n"
       "});\n");
-  ExtensionTestMessageListener ready("ready", true);
+  ExtensionTestMessageListener ready("ready", false);
   const Extension* extension = LoadExtension(ext_dir_.unpacked_path());
   ASSERT_TRUE(extension);
   const ExtensionAction* page_action =
       ExtensionActionManager::Get(browser()->profile())->
       GetPageAction(*extension);
   ASSERT_TRUE(page_action);
 
   ASSERT_TRUE(ready.WaitUntilSatisfied());
   content::WebContents* const tab =
       browser()->tab_strip_model()->GetWebContentsAt(0);
   const int tab_id = ExtensionTabUtil::GetTabId(tab);
 
   // There should be no declarative icon until we navigate to a matched page.
   EXPECT_TRUE(page_action->GetDeclarativeIcon(tab_id).IsEmpty());
   NavigateInRenderer(tab, GURL("http://test1/"));
   EXPECT_FALSE(page_action->GetDeclarativeIcon(tab_id).IsEmpty());
 
   // Navigating to an unmatched page should reset the icon.
   NavigateInRenderer(tab, GURL("http://test2/"));
   EXPECT_TRUE(page_action->GetDeclarativeIcon(tab_id).IsEmpty());
 }
 }  // namespace
 }  // namespace extensions