Migrate chrome_net_benchmarking_message_filter to mojo

chrome/common/net_benchmarking.mojom

Index: chrome/common/net_benchmarking.mojom
diff --git a/chrome/common/net_benchmarking.mojom b/chrome/common/net_benchmarking.mojom
new file mode 100644
index 0000000000000000000000000000000000000000..ec9e7e65eaf82138cb23a47ed791cca3e210e6f2
--- /dev/null
+++ b/chrome/common/net_benchmarking.mojom
@@ -0,0 +1,28 @@
+// Copyright 2016 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 chrome.mojom;
+
+interface NetBenchmarking {
+  // Message sent from the renderer to the browser to request that the browser

[sky, 2016/12/13 02:02:52]

I think test only functions should live in separate interfaces. That way you can
control access to it better.

[dvallet, 2016/12/13 05:20:04]

Done. Like so?

[Sam McNally, 2016/12/13 22:31:46]

All the messages in this interface are test-only.

+  // close all sockets.  Used for debugging/testing.
+  [Sync]
+  CloseCurrentConnections() => ();
+
+  // Message sent from the renderer to the browser to request that the browser
+  // clear the cache.  Used for debugging/testing.
+  // |result| is the returned status from the operation.
+  [Sync]
+  ClearCache() => (int32 result);
+
+  // Message sent from the renderer to the browser to request that the browser
+  // clear the host cache.  Used for debugging/testing.
+  [Sync]
+  ClearHostResolverCache() => ();
+  
+  // Message sent from the renderer to the browser to request that the browser
+  // clear the predictor cache.  Used for debugging/testing.
+  [Sync]
+  ClearPredictorCache() => ();
+};