Revert of [Chromoting] Retrieve process resource usage (ProcessStats) and its tests

remoting/proto/process_stats.proto

-// Copyright 2017 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.
-
-// Protocol for process resource usage.
-
-syntax = "proto2";
-
-option optimize_for = LITE_RUNTIME;
-
-package remoting.protocol;
-
-// The resource usage of a single process.
-// Next Id: 5
-message ProcessResourceUsage {
-  // The name or friendly name of the process.
-  optional string process_name = 1;
-
-  // The processor usage. It should be a consistent value on all platforms in
-  // range of 0 to (100 * NumCPUCores).
-  optional double processor_usage = 2;
-
-  // Memory usage of working set.
-  optional uint64 working_set_size = 3;
-
-  // Memory usage of page file.
-  optional uint64 pagefile_size = 4;
-}
-
-// The resource usage of several processes.
-// Next Id: 6
-message AggregatedProcessResourceUsage {
-  // A friendly name of the processes current instance aggregated from.
-  optional string name = 1;
-
-  // The total processor usage.
-  optional double processor_usage = 2;
-
-  // The total memory usage of working set.
-  optional uint64 working_set_size = 3;
-
-  // The total memory usage of page file.
-  optional uint64 pagefile_size = 4;
-
-  // The process resource usage of each individual process.
-  repeated ProcessResourceUsage usages = 5;
-}