Mojo: Add BindingsSupportImpl on top of HandleWatcher

mojo/common/handle_watcher_unittest.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 "mojo/common/handle_watcher.h"
 
 #include "base/auto_reset.h"
 #include "base/bind.h"
 #include "base/run_loop.h"
 #include "base/test/simple_test_tick_clock.h"
@@ skipping 41 matching lines @@
 
   // Runs the current MessageLoop until the callback returned from GetCallback()
   // is notified.
   void RunUntilGotCallback() {
     ASSERT_TRUE(run_loop_ == NULL);
     base::RunLoop run_loop;
     base::AutoReset<base::RunLoop*> reseter(&run_loop_, &run_loop);
     run_loop.Run();
   }
 
-  base::Closure GetCallback() {
+  base::Callback<void(MojoResult)> GetCallback() {
     return base::Bind(&CallbackHelper::OnCallback, weak_factory_.GetWeakPtr());
   }
 
   void Start(HandleWatcher* watcher, MojoHandle handle) {
     watcher->Start(handle, MOJO_WAIT_FLAG_READABLE, MOJO_DEADLINE_INDEFINITE,
                    GetCallback());
   }
 
  private:
-  void OnCallback() {
+  void OnCallback(MojoResult result) {
     got_callback_ = true;
     if (run_loop_)
       run_loop_->Quit();
   }
 
   // Set to true when the callback is called.
   bool got_callback_;
 
   // If non-NULL we're in RunUntilGotCallback().
   base::RunLoop* run_loop_;
@@ skipping 188 matching lines @@
 
   callback_helper2.RunUntilGotCallback();
   EXPECT_FALSE(callback_helper1.got_callback());
   EXPECT_TRUE(callback_helper2.got_callback());
   EXPECT_FALSE(callback_helper3.got_callback());
 }
 
 }  // namespace test
 }  // namespace common
 }  // namespace mojo