Disassociate argument type from return type in PostTaskAndReplyWithResult template.

base/task_runner_util_unittest.cc

Index: base/task_runner_util_unittest.cc
diff --git a/base/task_runner_util_unittest.cc b/base/task_runner_util_unittest.cc
index e6430bf4e006e29527353d8af7aa4999000ee499..d4d37692bace08028a619dccb7a752494cbaafdd 100644
--- a/base/task_runner_util_unittest.cc
+++ b/base/task_runner_util_unittest.cc
@@ -20,6 +20,10 @@ void StoreValue(int* destination, int value) {
   *destination = value;
 }
 
+void StoreDoubleValue(double* destination, double value) {
+  *destination = value;
+}
+
 int g_foo_destruct_count = 0;
 int g_foo_free_count = 0;
 
@@ -75,6 +79,21 @@ TEST(TaskRunnerHelpersTest, PostTaskAndReplyWithResult) {
   EXPECT_EQ(42, result);
 }
 
+TEST(TaskRunnerHelpersTest, PostTaskAndReplyWithResultImplicitConvert) {
+  MessageLoop message_loop;
+  double result = 0;
+
+  PostTaskAndReplyWithResult(
+      message_loop.message_loop_proxy(),
+      FROM_HERE,
+      Bind(&ReturnFourtyTwo),
+      Bind(&StoreDoubleValue, &result));
+
+  message_loop.RunUntilIdle();
+
+  EXPECT_DOUBLE_EQ(42.0, result);
+}
+
 TEST(TaskRunnerHelpersTest, PostTaskAndReplyWithResultPassed) {
   g_foo_destruct_count = 0;
   g_foo_free_count = 0;