Blimp: create Mojo component for renderer/browser communication.

blimp/engine/mojo/blob_channel.mojom

Index: blimp/engine/mojo/blob_channel.mojom
diff --git a/blimp/engine/mojo/blob_channel.mojom b/blimp/engine/mojo/blob_channel.mojom
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index 0000000000000000000000000000000000000000..fe3ebb9dc4734f6a6950387739cc04afc5f7b899
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+// 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 blimp.engine.mojom;
+
+interface BlobChannel {
+  // Stores the blob |id| in the BlobCache.
+  Put(string id, array<uint8> data);
+
+  // Requests that the BlobChannel push the blob |id| over the wire.
+  // The request will be ignored if the BlobChannel knows that
+  // the client already has the data.
+  Push(string id);
+};
+