EDK: Add a PlatformHandleWatcher argument to embedder::InitIPCSupport().

shell/task_runners.h

Index: shell/task_runners.h
diff --git a/shell/task_runners.h b/shell/task_runners.h
index 5ed78b8b68c67262bcb02bad9e66506683e202f6..aed1f99485c731441869c490f87e0234c2c986c7 100644
--- a/shell/task_runners.h
+++ b/shell/task_runners.h
@@ -5,11 +5,14 @@
 #ifndef SHELL_TASK_RUNNERS_H_
 #define SHELL_TASK_RUNNERS_H_
 
+#include <memory>
+
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/single_thread_task_runner.h"
 #include "base/threading/thread.h"
+#include "mojo/edk/platform/platform_handle_watcher.h"
 #include "mojo/edk/platform/task_runner.h"
 #include "mojo/edk/util/ref_ptr.h"
 
@@ -35,6 +38,10 @@ class TaskRunners {
     return io_runner_;
   }
 
+  mojo::platform::PlatformHandleWatcher* io_watcher() const {
+    return io_watcher_.get();
+  }
+
   base::SequencedWorkerPool* blocking_pool() const {
     return blocking_pool_.get();
   }
@@ -43,6 +50,7 @@ class TaskRunners {
   mojo::util::RefPtr<mojo::platform::TaskRunner> shell_runner_;
   scoped_ptr<base::Thread> io_thread_;
   mojo::util::RefPtr<mojo::platform::TaskRunner> io_runner_;
+  std::unique_ptr<mojo::platform::PlatformHandleWatcher> io_watcher_;
 
   scoped_refptr<base::SequencedWorkerPool> blocking_pool_;