(Fix landed) Revert of [CrOS Tether] Create HostScanCache, which caches scan results and inserts...

chromeos/components/tether/fake_host_scan_cache.cc

Index: chromeos/components/tether/fake_host_scan_cache.cc
diff --git a/chromeos/components/tether/fake_host_scan_cache.cc b/chromeos/components/tether/fake_host_scan_cache.cc
deleted file mode 100644
index 917a13a0f0a44528e8166c0a008a497102efa928..0000000000000000000000000000000000000000
--- a/chromeos/components/tether/fake_host_scan_cache.cc
+++ /dev/null
@@ -1,93 +0,0 @@
-// 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.
-
-#include "chromeos/components/tether/fake_host_scan_cache.h"
-
-#include "chromeos/components/tether/tether_host_response_recorder.h"
-
-namespace chromeos {
-
-namespace tether {
-
-namespace {
-
-// Shared among all FakeHostScanCache instances. This pointer is not used for
-// anything, but HostScanCache's constructor calls AddObserver() on the
-// TetherHostResponseRecorder* passed to its constructor, so a valid object must
-// be passed to the constructor to prevent a segfault.
-TetherHostResponseRecorder* kTetherHostResponseRecorder = nullptr;
-
-TetherHostResponseRecorder* GetTetherHostResponseRecorder() {
-  if (kTetherHostResponseRecorder)
-    return kTetherHostResponseRecorder;
-
-  kTetherHostResponseRecorder =
-      new TetherHostResponseRecorder(nullptr /* pref_service */);
-  return kTetherHostResponseRecorder;
-}
-
-}  // namespace
-
-FakeHostScanCache::FakeHostScanCache()
-    : HostScanCache(nullptr /* network_state_handler */,
-                    nullptr /* active_host */,
-                    GetTetherHostResponseRecorder(),
-                    nullptr /* device_id_tether_network_guid_map */) {}
-
-FakeHostScanCache::~FakeHostScanCache() {}
-
-const FakeHostScanCache::CacheEntry* FakeHostScanCache::GetCacheEntry(
-    const std::string& tether_network_guid) {
-  auto it = cache_.find(tether_network_guid);
-  if (it == cache_.end())
-    return nullptr;
-
-  return &it->second;
-}
-
-void FakeHostScanCache::SetHostScanResult(
-    const std::string& tether_network_guid,
-    const std::string& device_name,
-    const std::string& carrier,
-    int battery_percentage,
-    int signal_strength) {
-  auto it = cache_.find(tether_network_guid);
-  if (it != cache_.end()) {
-    // If already in the cache, update the cache with new values.
-    it->second.device_name = device_name;
-    it->second.carrier = carrier;
-    it->second.battery_percentage = battery_percentage;
-    it->second.signal_strength = signal_strength;
-    return;
-  }
-
-  // Otherwise, add a new entry.
-  cache_.emplace(
-      tether_network_guid,
-      CacheEntry{device_name, carrier, battery_percentage, signal_strength});
-}
-
-bool FakeHostScanCache::RemoveHostScanResult(
-    const std::string& tether_network_guid) {
-  if (tether_network_guid == active_host_tether_network_guid())
-    return false;
-
-  return cache_.erase(tether_network_guid) > 0;
-}
-
-void FakeHostScanCache::ClearCacheExceptForActiveHost() {
-  auto it = cache_.begin();
-  while (it != cache_.end()) {
-    if (it->first == active_host_tether_network_guid_)
-      it++;
-    else
-      it = cache_.erase(it);
-  }
-}
-
-void FakeHostScanCache::OnPreviouslyConnectedHostIdsChanged() {}
-
-}  // namespace tether
-
-}  // namespace chromeos