Added Aura notification that relaunch and powerwash is required in case of downgrade.

chromeos/dbus/update_engine_client.cc

 // Copyright (c) 2012 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/dbus/update_engine_client.h"
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/command_line.h"
 #include "base/message_loop/message_loop.h"
 #include "base/strings/string_util.h"
 #include "chromeos/chromeos_switches.h"
 #include "dbus/bus.h"
 #include "dbus/message.h"
 #include "dbus/object_path.h"
 #include "dbus/object_proxy.h"
 #include "third_party/cros_system_api/dbus/service_constants.h"
 
 namespace chromeos {
 
+const std::string UpdateEngineClient::kReleaseChannelDev = "dev-channel";
+const std::string UpdateEngineClient::kReleaseChannelBeta = "beta-channel";
+const std::string UpdateEngineClient::kReleaseChannelStable = "stable-channel";
+
 namespace {
 
-const char kReleaseChannelDev[] = "dev-channel";
-const char kReleaseChannelBeta[] = "beta-channel";
-const char kReleaseChannelStable[] = "stable-channel";
+const std::string kRawReleaseChannelsList[] = {
+    UpdateEngineClient::kReleaseChannelDev,
+    UpdateEngineClient::kReleaseChannelBeta,
+    UpdateEngineClient::kReleaseChannelStable};
+
+}  // namespace
+
+const std::vector<std::string> UpdateEngineClient::kReleaseChannelsList(
+    kRawReleaseChannelsList,
+    kRawReleaseChannelsList + arraysize(kRawReleaseChannelsList));
+
+namespace {
 
 // Delay between successive state transitions during AU.
 const int kStateTransitionDefaultDelayMs = 3000;
 
 // Delay between successive notifications about downloading progress
 // during fake AU.
 const int kStateTransitionDownloadingDelayMs = 250;
 
 // Size of parts of a "new" image which are downloaded each
 // |kStateTransitionDownloadingDelayMs| during fake AU.
@@ skipping 23 matching lines @@
     return UpdateEngineClient::UPDATE_STATUS_ATTEMPTING_ROLLBACK;
   return UpdateEngineClient::UPDATE_STATUS_ERROR;
 }
 
 // Used in UpdateEngineClient::EmptyUpdateCheckCallback().
 void EmptyUpdateCheckCallbackBody(
     UpdateEngineClient::UpdateCheckResult unused_result) {
 }
 
 bool IsValidChannel(const std::string& channel) {
-  return channel == kReleaseChannelDev ||
-      channel == kReleaseChannelBeta ||
-      channel == kReleaseChannelStable;
+  return channel == UpdateEngineClient::kReleaseChannelDev ||
+         channel == UpdateEngineClient::kReleaseChannelBeta ||
+         channel == UpdateEngineClient::kReleaseChannelStable;
 }
 
 }  // namespace
 
 // The UpdateEngineClient implementation used in production.
 class UpdateEngineClientImpl : public UpdateEngineClient {
  public:
   UpdateEngineClientImpl()
       : update_engine_proxy_(NULL), last_status_(), weak_ptr_factory_(this) {}
 
@@ skipping 473 matching lines @@
   if (type == REAL_DBUS_CLIENT_IMPLEMENTATION)
     return new UpdateEngineClientImpl();
   DCHECK_EQ(STUB_DBUS_CLIENT_IMPLEMENTATION, type);
   if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kTestAutoUpdateUI))
     return new UpdateEngineClientFakeImpl();
   else
     return new UpdateEngineClientStubImpl();
 }
 
 }  // namespace chromeos