Pass Callback to TaskRunner by value and consume it on invocation (1)

content/test/test_blink_web_unit_test_support.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 "content/test/test_blink_web_unit_test_support.h"
 
+#include "base/callback.h"
 #include "base/feature_list.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "base/path_service.h"
 #include "base/single_thread_task_runner.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/threading/platform_thread.h"
@@ skipping 40 matching lines @@
 
 using blink::WebString;
 
 namespace {
 
 class DummyTaskRunner : public base::SingleThreadTaskRunner {
  public:
   DummyTaskRunner() : thread_id_(base::PlatformThread::CurrentId()) {}
 
   bool PostDelayedTask(const tracked_objects::Location& from_here,
-                       const base::Closure& task,
+                       base::Closure task,
                        base::TimeDelta delay) override {
     // Drop the delayed task.
     return false;
   }
 
   bool PostNonNestableDelayedTask(const tracked_objects::Location& from_here,
-                                  const base::Closure& task,
+                                  base::Closure task,
                                   base::TimeDelta delay) override {
     // Drop the delayed task.
     return false;
   }
 
   bool RunsTasksOnCurrentThread() const override {
     return thread_id_ == base::PlatformThread::CurrentId();
   }
 
  protected:
@@ skipping 263 matching lines @@
 blink::WebRTCCertificateGenerator*
 TestBlinkWebUnitTestSupport::createRTCCertificateGenerator() {
 #if BUILDFLAG(ENABLE_WEBRTC)
   return new TestWebRTCCertificateGenerator();
 #else
   return nullptr;
 #endif
 }
 
 }  // namespace content