Remove task.h and finish base::Bind() migration.

base/task_unittest.cc

-// Copyright (c) 2012 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/bind.h"
-#include "base/memory/ref_counted.h"
-#include "base/task.h"
-#include "testing/gtest/include/gtest/gtest.h"
-
-namespace {
-
-void Increment(int* value) {
-  (*value)++;
-}
-
-TEST(TaskTest, TestScopedClosureRunnerExitScope) {
-  int run_count = 0;
-  {
-    base::ScopedClosureRunner runner(base::Bind(&Increment, &run_count));
-    EXPECT_EQ(0, run_count);
-  }
-  EXPECT_EQ(1, run_count);
-}
-
-TEST(TaskTest, TestScopedClosureRunnerRelease) {
-  int run_count = 0;
-  base::Closure c;
-  {
-    base::ScopedClosureRunner runner(base::Bind(&Increment, &run_count));
-    c = runner.Release();
-    EXPECT_EQ(0, run_count);
-  }
-  EXPECT_EQ(0, run_count);
-  c.Run();
-  EXPECT_EQ(1, run_count);
-}
-
-}  // namespace