Upstream Chrome on iOS source code [1/11].

ios/chrome/app/application_phase.h

Index: ios/chrome/app/application_phase.h
diff --git a/ios/chrome/app/application_phase.h b/ios/chrome/app/application_phase.h
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+// 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.
+
+// ======                        New Architecture                         =====
+// =         This code is only used in the new iOS Chrome architecture.       =
+// ============================================================================
+
+#ifndef IOS_CHROME_APP_APPLICATION_PHASE_H_
+#define IOS_CHROME_APP_APPLICATION_PHASE_H_
+
+// The phases that the application moves through as it transitions between
+// states.
+typedef NS_ENUM(NSUInteger, ApplicationPhase) {
+  // The initial state of the application performing a cold launch.
+  APPLICATION_COLD,
+  // The minimal initialization that must be completed before any further
+  // startup can happen. |applicationDidFinishLaunching:withOptions:| must
+  // bring the appication to at least this phase before returning.
+  APPLICATION_BASIC,
+  // The phase required for any background handling.
+  APPLICATION_BACKGROUNDED,
+  // The phase where the app is foregrounded but Safe Mode has been started.
+  APPLICATION_SAFE_MODE,
+  // The phase where the app is fully foregrounded and the regular UI has
+  // started.
+  APPLICATION_FOREGROUNDED,
+  // The phase where the application has started to terminate.
+  APPLICATION_TERMINATING
+};
+
+#endif  // IOS_CHROME_APP_APPLICATION_PHASE_H_