mac: Delete more 10.5-only code

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 a4053fd5b0cb6a7aa4d6c44f858ae8dd8eec6bac..ba13ff9e760add256377eac861df2921928b0582 100644
--- a/base/mac/mac_util.h
+++ b/base/mac/mac_util.h
@@ -126,10 +126,6 @@ BASE_EXPORT bool WasLaunchedAsHiddenLoginItem();
 // "OrLater" variants to those that check for a specific version, unless you
 // know for sure that you need to check for a specific version.
 
-// Leopard is Mac OS X 10.5, Darwin 9.
-BASE_EXPORT bool IsOSLeopard();
-BASE_EXPORT bool IsOSLeopardOrEarlier();
-
 // Snow Leopard is Mac OS X 10.6, Darwin 10.
 BASE_EXPORT bool IsOSSnowLeopard();
 BASE_EXPORT bool IsOSSnowLeopardOrEarlier();
@@ -158,8 +154,6 @@ BASE_EXPORT
 #if defined(MAC_OS_X_VERSION_10_6) && \
     MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_6
 #define BASE_MAC_MAC_UTIL_H_INLINED_GE_10_6
-inline bool IsOSLeopard() { return false; }
-inline bool IsOSLeopardOrEarlier() { return false; }
 inline bool IsOSSnowLeopardOrLater() { return true; }
 #endif