Add ScopedClosureRunner.

base/task_unittest.cc

Index: base/task_unittest.cc
diff --git a/base/task_unittest.cc b/base/task_unittest.cc
index e0cb659cf094c01db34730189989efef07a243d2..d7d31fa47b2eace0011df618f4ed34c3b7d01a45 100644
--- a/base/task_unittest.cc
+++ b/base/task_unittest.cc
@@ -2,6 +2,7 @@
 // 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"
@@ -107,4 +108,30 @@ TEST(TaskTest, TestScopedTaskRunnerManualRun) {
   EXPECT_TRUE(was_deleted);
 }
 
+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