Remove all blimp client code.

blimp/client/core/context/assignment_fetcher.cc

-// 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.
-
-#include "blimp/client/core/context/assignment_fetcher.h"
-
-#include <string>
-#include <utility>
-
-#include "base/bind.h"
-#include "base/memory/ptr_util.h"
-#include "blimp/client/core/session/assignment_source.h"
-#include "blimp/client/core/session/identity_source.h"
-
-namespace blimp {
-namespace client {
-
-AssignmentFetcher::AssignmentFetcher(
-    scoped_refptr<base::SingleThreadTaskRunner> io_thread_task_runner,
-    scoped_refptr<base::SingleThreadTaskRunner> file_thread_task_runner,
-    std::unique_ptr<IdentityProvider> identity_provider,
-    GURL assigner_url,
-    const AssignmentResultCallback& assignment_received_callback,
-    const AuthErrorCallback& error_callback)
-    : identity_source_(base::MakeUnique<IdentitySource>(
-          std::move(identity_provider),
-          error_callback,
-          base::Bind(&AssignmentFetcher::OnAuthTokenReceived,
-                     base::Unretained(this)))),
-      assignment_received_callback_(assignment_received_callback),
-      assigner_url_(assigner_url),
-      io_thread_task_runner_(io_thread_task_runner),
-      file_thread_task_runner_(file_thread_task_runner) {}
-
-AssignmentFetcher::~AssignmentFetcher() = default;
-
-void AssignmentFetcher::Fetch() {
-  // Start Blimp authentication flow. The OAuth2 token will be used in
-  // assignment source.
-  identity_source_->Connect();
-}
-
-IdentitySource* AssignmentFetcher::GetIdentitySource() {
-  return identity_source_.get();
-}
-
-void AssignmentFetcher::OnAuthTokenReceived(
-    const std::string& client_auth_token) {
-  if (!assignment_source_) {
-    assignment_source_.reset(new AssignmentSource(
-        assigner_url_, io_thread_task_runner_, file_thread_task_runner_));
-  }
-
-  VLOG(1) << "Trying to get assignment.";
-  assignment_source_->GetAssignment(client_auth_token,
-                                    assignment_received_callback_);
-}
-
-}  // namespace client
-}  // namespace blimp