Remove all blimp engine code

blimp/engine/mojo/blob_channel.mojom

-// 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;
-
-// Exposes BlobChannel data producer methods to the renderer processes.
-// The renderer can use this service to push bulk data such as images to
-// the client.
-interface BlobChannel {
-  // Gets the list of cached BlobIDs and their replication status in the
-  // browser process' BlobCache. The replication status is represented
-  // as a boolean which, when true, indicates that the blob has been
-  // sent to the client.
-  // TODO(kmarshall): Add a delegate receiver to process cache invalidation
-  // events from the browser as they occur.
-  GetCachedBlobIds() => (map<string, bool> cache_state);
-
-  // Stores the blob |id| in the BlobCache.
-  // Because the IPC channel is a shared resource and payloads can be quite
-  // large, we use shared memory to reduce channel contention and associated
-  // latency with other components/features.
-  //
-  // The buffer is released when the callee discards the handle for |data|.
-  PutBlob(string id, handle<shared_buffer> data, uint32 size);
-
-  // 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.
-  DeliverBlob(string id);
-};
-