Mojo C++ bindings: Add an alias, BarAssociatedPtr, for AssociatedInterfacePtr<Bar>.

mojo/public/cpp/bindings/tests/associated_interface_unittest.cc

Index: mojo/public/cpp/bindings/tests/associated_interface_unittest.cc
diff --git a/mojo/public/cpp/bindings/tests/associated_interface_unittest.cc b/mojo/public/cpp/bindings/tests/associated_interface_unittest.cc
index 3ba9941e895d6ed6b986010c6dd6e05773573226..09885ea1520f0df4defdfc397bf585cee12609c4 100644
--- a/mojo/public/cpp/bindings/tests/associated_interface_unittest.cc
+++ b/mojo/public/cpp/bindings/tests/associated_interface_unittest.cc
@@ -477,7 +477,7 @@ TEST_F(AssociatedInterfaceTest, PassAssociatedInterfaces) {
   IntegerSenderConnectionPtr connection_ptr;
   IntegerSenderConnectionImpl connection(GetProxy(&connection_ptr));
 
-  AssociatedInterfacePtr<IntegerSender> sender0;
+  IntegerSenderAssociatedPtr sender0;
   connection_ptr->GetSender(
       GetProxy(&sender0, connection_ptr.associated_group()));
 
@@ -486,7 +486,7 @@ TEST_F(AssociatedInterfaceTest, PassAssociatedInterfaces) {
   PumpMessages();
   EXPECT_EQ(123, echoed_value);
 
-  AssociatedInterfacePtr<IntegerSender> sender1;
+  IntegerSenderAssociatedPtr sender1;
   connection_ptr->AsyncGetSender(
       [&sender1](AssociatedInterfacePtrInfo<IntegerSender> ptr_info) {
         sender1.Bind(ptr_info.Pass());