Update OS version functions.

base/mac/mac_util.h

Index: base/mac/mac_util.h
diff --git a/base/mac/mac_util.h b/base/mac/mac_util.h
index 23b57edaee2a983a607175c6e4ed06e963728a01..9f66b9034c29c27add8cf43ae55abc1a5d51e9f5 100644
--- a/base/mac/mac_util.h
+++ b/base/mac/mac_util.h
@@ -145,12 +145,23 @@ BASE_EXPORT bool IsOSLionOrLater();
 
 // Mountain Lion is Mac OS X 10.8, Darwin 12.
 BASE_EXPORT bool IsOSMountainLion();
+BASE_EXPORT bool IsOSMountainLionOrEarlier();
 BASE_EXPORT bool IsOSMountainLionOrLater();
 
+// Mavericks is Mac OS X 10.9, Darwin 13.
+BASE_EXPORT bool IsOSMavericks();
+BASE_EXPORT bool IsOSMavericksOrLater();
+
 // This should be infrequently used. It only makes sense to use this to avoid
 // codepaths that are very likely to break on future (unreleased, untested,
 // unborn) OS releases, or to log when the OS is newer than any known version.
-BASE_EXPORT bool IsOSLaterThanMountainLion_DontCallThis();
+BASE_EXPORT bool IsOSLaterThanMavericks_DontCallThis();
+
+// Inline functions that are redundant due to version ranges being mutually-
+// exclusive.
+inline bool IsOSSnowLeopard() { return !IsOSLionOrLater(); }

[Mark Mentovai, 2013/10/01 18:30:59]

I don’t like the definition of this one. It relies on more than this file
guarantees. This file, and much of base, may be used outside of Chrome, and this
definition would be tricky to find and fix for consumers that don’t mandate a
minimum of 10.6. Can you leave IsOSSnowLeopard defined as it was?

[Avi (use Gerrit), 2013/10/01 19:24:22]

Done.

+inline bool IsOSLionOrEarlier() { return !IsOSMountainLionOrLater(); }

[Mark Mentovai, 2013/10/01 18:30:59]

These two are fine.

+inline bool IsOSMountainLionOrEarlier() { return !IsOSMavericksOrLater(); }
 
 // When the deployment target is set, the code produced cannot run on earlier
 // OS releases. That enables some of the IsOS* family to be implemented as
@@ -160,7 +171,6 @@ BASE_EXPORT bool IsOSLaterThanMountainLion_DontCallThis();
 #if defined(MAC_OS_X_VERSION_10_7) && \
     MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_7
 #define BASE_MAC_MAC_UTIL_H_INLINED_GE_10_7
-inline bool IsOSSnowLeopard() { return false; }
 inline bool IsOSLionOrLater() { return true; }
 #endif
 
@@ -168,7 +178,6 @@ inline bool IsOSLionOrLater() { return true; }
     MAC_OS_X_VERSION_MIN_REQUIRED > MAC_OS_X_VERSION_10_7
 #define BASE_MAC_MAC_UTIL_H_INLINED_GT_10_7
 inline bool IsOSLion() { return false; }
-inline bool IsOSLionOrEarlier() { return false; }
 #endif
 
 #if defined(MAC_OS_X_VERSION_10_8) && \
@@ -181,9 +190,19 @@ inline bool IsOSMountainLionOrLater() { return true; }
     MAC_OS_X_VERSION_MIN_REQUIRED > MAC_OS_X_VERSION_10_8
 #define BASE_MAC_MAC_UTIL_H_INLINED_GT_10_8
 inline bool IsOSMountainLion() { return false; }
-inline bool IsOSLaterThanMountainLion_DontCallThis() {
-  return true;
-}
+#endif
+
+#if defined(MAC_OS_X_VERSION_10_9) && \
+    MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_9
+#define BASE_MAC_MAC_UTIL_H_INLINED_GE_10_9
+inline bool IsOSMavericksOrLater() { return true; }
+#endif
+
+#if defined(MAC_OS_X_VERSION_10_9) && \
+    MAC_OS_X_VERSION_MIN_REQUIRED > MAC_OS_X_VERSION_10_9
+#define BASE_MAC_MAC_UTIL_H_INLINED_GT_10_9
+inline bool IsOSMavericks() { return false; }
+inline bool IsOSLaterThanMavericks_DontCallThis() { return true; }
 #endif
 
 // Retrieve the system's model identifier string from the IOKit registry: