Mojo: re-organize public tests

mojo/public/tests/math_calculator.mojom

Index: mojo/public/tests/math_calculator.mojom
diff --git a/mojo/public/tests/math_calculator.mojom b/mojo/public/tests/math_calculator.mojom
deleted file mode 100644
index 949a9023e07ca8787fb930eba18eb630bc4f04d0..0000000000000000000000000000000000000000
--- a/mojo/public/tests/math_calculator.mojom
+++ /dev/null
@@ -1,19 +0,0 @@
-// 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.
-
-module math {
-
-[Peer=CalculatorUI]
-interface Calculator {
-  void Clear() @0;
-  void Add(double value @0) @1;
-  void Multiply(double value @0) @2;
-};
-
-[Peer=Calculator]
-interface CalculatorUI {
-  void Output(double value @0) @0;
-};
-
-}