Fix ExtensionServiceTest.ClearExtensionData flakiness

chrome/browser/extensions/activity_log/activity_log_enabled_unittest.cc

 // Copyright 2013 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 "base/command_line.h"
 #include "base/prefs/pref_service.h"
 #include "base/run_loop.h"
 #include "chrome/browser/extensions/activity_log/activity_log.h"
 #include "chrome/browser/extensions/api/activity_log_private/activity_log_private_api.h"
 #include "chrome/browser/extensions/extension_service.h"
@@ skipping 172 matching lines @@
   EXPECT_EQ(1,
       profile1->GetPrefs()->GetInteger(prefs::kWatchdogExtensionActive));
   EXPECT_EQ(0,
       profile2->GetPrefs()->GetInteger(prefs::kWatchdogExtensionActive));
   EXPECT_TRUE(activity_log1->IsWatchdogAppActive());
   EXPECT_FALSE(activity_log2->IsWatchdogAppActive());
   EXPECT_TRUE(activity_log1->IsDatabaseEnabled());
   EXPECT_FALSE(activity_log2->IsDatabaseEnabled());
 
   extension_service1->UninstallExtension(
-      kExtensionID, extensions::UNINSTALL_REASON_FOR_TESTING, NULL);
+      kExtensionID,
+      extensions::UNINSTALL_REASON_FOR_TESTING,
+      base::Bind(&base::DoNothing),
+      NULL);
 
   EXPECT_EQ(0,
       profile1->GetPrefs()->GetInteger(prefs::kWatchdogExtensionActive));
   EXPECT_EQ(0,
       profile2->GetPrefs()->GetInteger(prefs::kWatchdogExtensionActive));
   EXPECT_FALSE(activity_log1->IsWatchdogAppActive());
   EXPECT_FALSE(activity_log2->IsWatchdogAppActive());
   EXPECT_FALSE(activity_log1->IsDatabaseEnabled());
   EXPECT_FALSE(activity_log2->IsDatabaseEnabled());
 
@@ skipping 55 matching lines @@
           .SetID(kExtensionID)
           .Build();
   extension_service->AddExtension(extension.get());
 
   EXPECT_TRUE(activity_log->IsDatabaseEnabled());
   EXPECT_EQ(1,
       profile->GetPrefs()->GetInteger(prefs::kWatchdogExtensionActive));
   EXPECT_TRUE(activity_log->IsWatchdogAppActive());
 
   extension_service->UninstallExtension(
-      kExtensionID, extensions::UNINSTALL_REASON_FOR_TESTING, NULL);
+      kExtensionID,
+      extensions::UNINSTALL_REASON_FOR_TESTING,
+      base::Bind(&base::DoNothing),
+      NULL);
 
   EXPECT_TRUE(activity_log->IsDatabaseEnabled());
   EXPECT_EQ(0,
       profile->GetPrefs()->GetInteger(prefs::kWatchdogExtensionActive));
   EXPECT_FALSE(activity_log->IsWatchdogAppActive());
 
   // Cleanup.
   *CommandLine::ForCurrentProcess() = saved_cmdline_;
 }
 
 } // namespace extensions