Drop the const modifier on NotificationDisplayService::GetDisplayed

chrome/browser/notifications/platform_notification_service_unittest.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 <stdint.h>
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/macros.h"
@@ skipping 95 matching lines @@
         std::move(notification_bridge));
   }
 
   void TearDown() override {
     profile_manager_.reset();
     TestingBrowserProcess::DeleteInstance();
   }
 
   void DidGetDisplayedNotifications(
       std::unique_ptr<std::set<std::string>> displayed_notifications,
-      bool supports_synchronization) const {
+      bool supports_synchronization) {
     displayed_notifications_ = std::move(displayed_notifications);
   }
 
  protected:
   // Displays a simple, fake notifications and returns a weak pointer to the
   // delegate receiving events for it (ownership is transferred to the service).
   MockDesktopNotificationDelegate* CreateSimplePageNotification() const {
     return CreateSimplePageNotificationWithCloseClosure(nullptr);
   }
 
@@ skipping 18 matching lines @@
   }
 
   // Returns the Platform Notification Service these unit tests are for.
   PlatformNotificationServiceImpl* service() const {
     return PlatformNotificationServiceImpl::GetInstance();
   }
 
   // Returns the Profile to be used for these tests.
   Profile* profile() const { return profile_; }
 
-  size_t GetNotificationCount() const {
+  size_t GetNotificationCount() {
     display_service()->GetDisplayed(base::Bind(
         &PlatformNotificationServiceTest::DidGetDisplayedNotifications,
         base::Unretained(this)));
     base::RunLoop().RunUntilIdle();
 
     EXPECT_TRUE(displayed_notifications_.get());
     return displayed_notifications_->size();
   }
 
   Notification GetDisplayedNotification() {
 #if defined(OS_ANDROID)
     return static_cast<StubNotificationPlatformBridge*>(
                g_browser_process->notification_platform_bridge())
         ->GetNotificationAt(profile_->GetPath().BaseName().value(), 0);
 #else
     return static_cast<StubNotificationUIManager*>(
                g_browser_process->notification_ui_manager())
         ->GetNotificationAt(0);
 #endif
   }
 
  private:
   NotificationDisplayService* display_service() const {
     return NotificationDisplayServiceFactory::GetForProfile(profile_);
   }
 
   std::unique_ptr<TestingProfileManager> profile_manager_;
   TestingProfile* profile_;
   content::TestBrowserThreadBundle thread_bundle_;
-  mutable std::unique_ptr<std::set<std::string>> displayed_notifications_;
+  std::unique_ptr<std::set<std::string>> displayed_notifications_;
 };
 
 TEST_F(PlatformNotificationServiceTest, DisplayPageDisplayedEvent) {
   auto* delegate = CreateSimplePageNotification();
 
   EXPECT_EQ(1u, GetNotificationCount());
   EXPECT_TRUE(delegate->displayed());
 }
 
 TEST_F(PlatformNotificationServiceTest, DisplayPageCloseClosure) {
@@ skipping 229 matching lines @@
       profile(),
       GURL() /* service_worker_scope */,
       GURL("chrome-extension://honijodknafkokifofgiaalefdiedpko/main.html"),
       notification_data, NotificationResources(),
       new MockNotificationDelegate("hello"));
   EXPECT_EQ("NotificationTest",
             base::UTF16ToUTF8(notification.context_message()));
 }
 
 #endif  // BUILDFLAG(ENABLE_EXTENSIONS)