Reduce boilerplate needed to configure mojo::Binding

mojo/public/cpp/bindings/binding.h

Index: mojo/public/cpp/bindings/binding.h
diff --git a/mojo/public/cpp/bindings/binding.h b/mojo/public/cpp/bindings/binding.h
index 781f3f34a83a968bbc6838ad05caa7c1e24dd79a..1c69aa321d91545c6b541a342fd89311926eb167 100644
--- a/mojo/public/cpp/bindings/binding.h
+++ b/mojo/public/cpp/bindings/binding.h
@@ -111,6 +111,14 @@ class Binding {
   // implementation unbound.
   ~Binding() {}
 
+  // Returns an InterfacePtr bound to one end of a pipe whose other end is
+  // bound to |this|.
+  InterfacePtr<Interface> CreateInterfacePtrAndBind() {

[yzshen1, 2016/01/21 01:12:09]

Please add a |waiter| param (just like line 127), and pass it into Bind().

[sky, 2016/01/21 14:35:26]

Do we really need the waiter param? And doesn't the style guide say no default
args? How about I add it if we actually use it somewhere.

+    InterfacePtr<Interface> interface_ptr;
+    Bind(&interface_ptr);
+    return std::move(interface_ptr);

[yzshen1, 2016/01/21 01:12:09]

I think std::move() is not needed.

[sky, 2016/01/21 17:50:24]

Done.

+  }
+
   // Completes a binding that was constructed with only an interface
   // implementation. Takes ownership of |handle| and binds it to the previously
   // specified implementation. See class comment for definition of |waiter|.