Remove createSameThreadTask() and deprecate createCrossThreadTask()

third_party/WebKit/Source/core/dom/ExecutionContextTask.h

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Neither the name of Google Inc. nor the names of its
@@ skipping 83 matching lines @@
 // createSameThreadTask.
 // See http://crbug.com/390851
 template <typename T, WTF::FunctionThreadAffinity threadAffinity>
 std::unique_ptr<CallClosureTask<T, threadAffinity>> createCallClosureTask(
     std::unique_ptr<Function<T, threadAffinity>> closure) {
   return CallClosureTask<T, threadAffinity>::create(std::move(closure));
 }
 
 }  // namespace internal
 
-// Create tasks passed within a single thread.
-// When posting tasks within a thread, use |createSameThreadTask| instead
-// of using |bind| directly to state explicitly that there is no need to care
-// about thread safety when posting the task.
-// When posting tasks across threads, use |createCrossThreadTask|.
-template <typename FunctionType, typename... P>
-std::unique_ptr<ExecutionContextTask> createSameThreadTask(
-    FunctionType function,
-    P&&... parameters) {
-  return internal::createCallClosureTask(
-      WTF::bind(function, std::forward<P>(parameters)...));
-}
+// createSameThreadTask() is deprecated and removed.
+// Use WTF::bind() and post it to WebTaskRunner obtained by
+// TaskRunnerHelper::get() when posting a task within a single thread.
 
+// createCrossThreadTask() is deprecated and will be removed.
+// Use crossThreadBind() and post it to an appropriate task runner
+// when posting a task to another thread.
+// See https://crbug.com/625927 for details.
+//
 // createCrossThreadTask(...) is ExecutionContextTask version of
 // crossThreadBind().
 // Using WTF::bind() directly is not thread-safe due to temporary objects, see
 // https://crbug.com/390851 for details.
 //
 // Example:
 //     void func1(int, const String&);
 //     createCrossThreadTask(func1, 42, str);
 // func1(42, str2) will be called, where |str2| is a deep copy of
 // |str| (created by str.isolatedCopy()).
@@ skipping 35 matching lines @@
 std::unique_ptr<ExecutionContextTask> createCrossThreadTask(
     FunctionType function,
     P&&... parameters) {
   return internal::createCallClosureTask(
       crossThreadBind(function, std::forward<P>(parameters)...));
 }
 
 }  // namespace blink
 
 #endif