Update OS version functions for OS X 10.11 El Capitan.

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 f8ffa97545decf3717c102853461d92877f5e8a6..a452a39bdd4077d13e078134873b0fa2bc5c19c4 100644
--- a/base/mac/mac_util.h
+++ b/base/mac/mac_util.h
@@ -145,18 +145,24 @@ BASE_EXPORT bool IsOSMavericksOrLater();
 
 // Yosemite is Mac OS X 10.10, Darwin 14.
 BASE_EXPORT bool IsOSYosemite();
+BASE_EXPORT bool IsOSYosemiteOrEarlier();
 BASE_EXPORT bool IsOSYosemiteOrLater();
 
+// El Capitan is Mac OS X 10.11, Darwin 15.
+BASE_EXPORT bool IsOSElCapitan();
+BASE_EXPORT bool IsOSElCapitanOrLater();
+
 // 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 IsOSLaterThanYosemite_DontCallThis();
+BASE_EXPORT bool IsOSLaterThanElCapitan_DontCallThis();
 
 // Inline functions that are redundant due to version ranges being mutually-
 // exclusive.
 inline bool IsOSLionOrEarlier() { return !IsOSMountainLionOrLater(); }
 inline bool IsOSMountainLionOrEarlier() { return !IsOSMavericksOrLater(); }
 inline bool IsOSMavericksOrEarlier() { return !IsOSYosemiteOrLater(); }
+inline bool IsOSYosemiteOrEarlier() { return !IsOSElCapitanOrLater(); }
 
 // 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
@@ -210,7 +216,19 @@ inline bool IsOSYosemiteOrLater() { return true; }
     MAC_OS_X_VERSION_MIN_REQUIRED > MAC_OS_X_VERSION_10_10
 #define BASE_MAC_MAC_UTIL_H_INLINED_GT_10_10
 inline bool IsOSYosemite() { return false; }
-inline bool IsOSLaterThanYosemite_DontCallThis() { return true; }
+#endif
+
+#if defined(MAC_OS_X_VERSION_10_11) && \
+    MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_11
+#define BASE_MAC_MAC_UTIL_H_INLINED_GE_10_11
+inline bool IsOSElCapitanOrLater() { return true; }
+#endif
+
+#if defined(MAC_OS_X_VERSION_10_11) && \
+    MAC_OS_X_VERSION_MIN_REQUIRED > MAC_OS_X_VERSION_10_11
+#define BASE_MAC_MAC_UTIL_H_INLINED_GT_10_11
+inline bool IsOSElCapitan() { return false; }
+inline bool IsOSLaterThanElCapitan_DontCallThis() { return true; }
 #endif
 
 // Retrieve the system's model identifier string from the IOKit registry: