[Mac] Add the OS version check functions for 10.8.

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 4fefe6c5ee80976d9788193dbd5e1c9b6a2c6d29..8820690cb694c4da0b94bebd0602279f68d12677 100644
--- a/base/mac/mac_util.h
+++ b/base/mac/mac_util.h
@@ -138,8 +138,14 @@ BASE_EXPORT bool IsOSSnowLeopardOrLater();
 
 // Lion is Mac OS X 10.7, Darwin 11.
 BASE_EXPORT bool IsOSLion();
+BASE_EXPORT bool IsOSLionOrEarlier();
 BASE_EXPORT bool IsOSLionOrLater();
 
+// Mountain Lion is Mac OS X 10.8, Darwin 12.
+BASE_EXPORT bool IsOSMountainLion();
+BASE_EXPORT bool IsOSMountainLionOrEarlier();

[Mark Mentovai, 2012/03/14 03:30:38]

This should not be present. Instead, provide IsOSLaterThanMountainLion, and
remove IsOSLaterThanLion.

[Robert Sesek, 2012/03/14 14:46:22]

I think it should be present. It will just have to be added later, so might as
well future proof.

IsOSLaterThanLion is currently used by a few (1) things, which is why it's not
changed here. But I think that the function should be renamed to IsOSFutureCat()
because that's what all the callsites are expressing with this function. And
then we don't have to rename it with each new OS release.

+BASE_EXPORT bool IsOSMountainLionOrLater();
+
 // 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.
@@ -170,9 +176,23 @@ 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; }
 inline bool IsOSLaterThanLion() { return true; }
 #endif
 
+#if defined(MAC_OS_X_VERSION_10_8) && \
+    MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_8
+#define BASE_MAC_MAC_UTIL_H_INLINED_GE_10_8
+inline bool IsOSMountainLionOrLater() { return true; }
+#endif
+
+#if defined(MAC_OS_X_VERSION_10_8) && \
+    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 IsOSMountainLionOrEarlier() { return false; }
+#endif
+
 // Retrieve the system's model identifier string from the IOKit registry:
 // for example, "MacPro4,1", "MacBookPro6,1". Returns empty string upon
 // failure.