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

chrome/browser/extensions/api/hotword_private/hotword_private_apitest.cc

 // Copyright 2014 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 <memory>
 
 #include "base/command_line.h"
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "chrome/browser/extensions/api/hotword_private/hotword_private_api.h"
@@ skipping 456 matching lines @@
   EXPECT_TRUE(listener.WaitUntilSatisfied());
 }
 
 IN_PROC_BROWSER_TEST_F(HotwordPrivateApiTest, AudioHistory) {
   MockWebHistoryService* web_history = new MockWebHistoryService(profile());
   MockAudioHistoryHandler* handler =
       new MockAudioHistoryHandler(profile(), web_history);
   service()->SetAudioHistoryHandler(handler);
   web_history->SetExpectedValue(true);
 
-  ExtensionTestMessageListener setListenerT("set AH: true success", false);
-  ExtensionTestMessageListener setListenerF("set AH: false success", false);
+  ExtensionTestMessageListener setListenerT("set AH True: true success", false);
+  ExtensionTestMessageListener setListenerF("set AH False: false success",
+                                            false);
   ExtensionTestMessageListener getListener("get AH: true success", false);
 
   ASSERT_TRUE(RunComponentExtensionTest("audioHistory")) << message_;
 
   EXPECT_TRUE(setListenerT.WaitUntilSatisfied());
   EXPECT_TRUE(setListenerF.WaitUntilSatisfied());
   EXPECT_TRUE(getListener.WaitUntilSatisfied());
 
   web_history->SetExpectedValue(false);
 
-  ExtensionTestMessageListener setListenerT2("set AH: true success", false);
-  ExtensionTestMessageListener setListenerF2("set AH: false success", false);
+  ExtensionTestMessageListener setListenerT2("set AH True: true success",
+                                             false);
+  ExtensionTestMessageListener setListenerF2("set AH False: false success",
+                                             false);
   ExtensionTestMessageListener getListener2("get AH: false success", false);
 
   ASSERT_TRUE(RunComponentExtensionTest("audioHistory")) << message_;
 
   EXPECT_TRUE(setListenerT2.WaitUntilSatisfied());
   EXPECT_TRUE(setListenerF2.WaitUntilSatisfied());
   EXPECT_TRUE(getListener2.WaitUntilSatisfied());
 }
 
 IN_PROC_BROWSER_TEST_F(HotwordPrivateApiTest, AudioHistoryNoWebHistory) {
   MockAudioHistoryHandler* handler =
       new MockAudioHistoryHandler(profile(), nullptr);
   service()->SetAudioHistoryHandler(handler);
 
   // Set an initial value for the audio logging pref.
   PrefService* prefs = profile()->GetPrefs();
   prefs->SetBoolean(prefs::kHotwordAudioLoggingEnabled, true);
 
-  ExtensionTestMessageListener setListenerT("set AH: true failure", false);
-  ExtensionTestMessageListener setListenerF("set AH: true failure", false);
+  ExtensionTestMessageListener setListenerT("set AH True: true failure", false);
+  ExtensionTestMessageListener setListenerF("set AH False: true failure",
+                                            false);
   ExtensionTestMessageListener getListener("get AH: true failure", false);
 
   ASSERT_TRUE(RunComponentExtensionTest("audioHistory")) << message_;
 
   EXPECT_TRUE(setListenerT.WaitUntilSatisfied());
   EXPECT_TRUE(setListenerF.WaitUntilSatisfied());
   EXPECT_TRUE(getListener.WaitUntilSatisfied());
 }
 
 IN_PROC_BROWSER_TEST_F(HotwordPrivateApiTest, AudioHistoryWebHistoryFailure) {
   MockWebHistoryService* web_history = new MockWebHistoryService(profile());
   MockAudioHistoryHandler* handler =
       new MockAudioHistoryHandler(profile(), web_history);
   service()->SetAudioHistoryHandler(handler);
   web_history->SetFailureState();
-  // It shouldn't matter if this is set to true. GetAduioHistoryEnabled should
+  // It shouldn't matter if this is set to true. GetAudioHistoryEnabled should
   // still return false.
   web_history->SetExpectedValue(true);
 
-  ExtensionTestMessageListener setListenerT("set AH: false failure", false);
-  ExtensionTestMessageListener setListenerF("set AH: false failure", false);
+  ExtensionTestMessageListener setListenerT("set AH True: true failure", false);
+  ExtensionTestMessageListener setListenerF("set AH False: false failure",
+                                            false);
   ExtensionTestMessageListener getListener("get AH: false failure", false);
 
   ASSERT_TRUE(RunComponentExtensionTest("audioHistory")) << message_;
 
   EXPECT_TRUE(setListenerT.WaitUntilSatisfied());
   EXPECT_TRUE(setListenerF.WaitUntilSatisfied());
   EXPECT_TRUE(getListener.WaitUntilSatisfied());
 }