Add FlushForTesting to InterfacePtr and Binding.

mojo/public/cpp/bindings/binding_set.h

Index: mojo/public/cpp/bindings/binding_set.h
diff --git a/mojo/public/cpp/bindings/binding_set.h b/mojo/public/cpp/bindings/binding_set.h
index dc66860b4e0d78fba19a3de4727f59bb6e235a59..6acf04ce15826ccba601cc06c4a4301fde66244a 100644
--- a/mojo/public/cpp/bindings/binding_set.h
+++ b/mojo/public/cpp/bindings/binding_set.h
@@ -95,6 +95,13 @@ class BindingSet {
     return dispatch_context_;
   }
 
+  void FlushForTesting() {
+    for (auto& binding : bindings_) {
+      if (binding)
+        binding->FlushForTesting();

[yzshen1, 2016/08/29 23:24:58]

I guess this won't work because bindings_ is a map so |binding| is a pair.

[Sam McNally, 2016/08/30 03:05:51]

It worked just fine last week ;)

+    }
+  }
+
  private:
   friend class Entry;
 
@@ -113,6 +120,8 @@ class BindingSet {
           &Entry::OnConnectionError, base::Unretained(this)));
     }
 
+    void FlushForTesting() { binding_.FlushForTesting(); }
+
    private:
     class DispatchFilter : public MessageReceiver {
      public: