In-app messaging to communicate the imminent 32-bit deprecation to 32-bit-only users

chrome/browser/mac/obsolete_system.h

+// Copyright 2014 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.
+
+#ifndef CHROME_BROWSER_MAC_OBSOLETE_SYSTEM_H_
+#define CHROME_BROWSER_MAC_OBSOLETE_SYSTEM_H_
+
+#include "base/basictypes.h"
+#include "base/strings/string16.h"
+
+class ObsoleteSystemMac {
+ public:
+  // true if 32-bit-only systems are already considered obsolete, or if
+  // they'll be considered obsolete soon. Used to control whether to show
+  // messaging about 32-bit deprecation within the app.
+  static bool Is32BitObsoleteNowOrSoon() {
+#if defined(GOOGLE_CHROME_BUILD)
+    return true;
+#else
+    return false;
+#endif
+  }
+
+  // true if the system's CPU is 32-bit-only, false if it's 64-bit-capable.
+#if !defined(ARCH_CPU_64_BITS)
+  static bool Has32BitOnlyCPU();
+#else
+  static bool Has32BitOnlyCPU() {
+    return false;
+  }
+#endif
+
+  // Returns a localized string informing users that their system will either
+  // soon be unsupported by future versions of the application, or that they
+  // are already using the last version of the application that supports their
+  // system. Do not use the returned string unless both
+  // Is32BitObsoleteNowOrSoon() and Has32BitOnlyCPU() return true.
+#if !defined(ARCH_CPU_64_BITS)
+  static base::string16 LocalizedObsoleteSystemString();
+#else
+  static base::string16 LocalizedObsoleteSystemString() {
+    return base::string16();
+  }
+#endif
+
+  // true if this is the final release that will run on 32-bit-only systems.
+  static bool Is32BitEndOfTheLine() {
+    // TODO(mark): Change to true immediately prior to the final build that
+    // supports 32-bit-only systems.
+    return false;
+  }
+
+ private:
+  DISALLOW_IMPLICIT_CONSTRUCTORS(ObsoleteSystemMac);
+};
+
+#endif  // CHROME_BROWSER_MAC_OBSOLETE_SYSTEM_H_