Update OS version functions for OS X 10.11 El Capitan.

base/test/expectations/expectation.cc

Index: base/test/expectations/expectation.cc
diff --git a/base/test/expectations/expectation.cc b/base/test/expectations/expectation.cc
index 30817791dd2da22d4f612c0959cd0864ae3f9a6c..f6c40bc114ea921ce5ebb3307550e1679dd7c344 100644
--- a/base/test/expectations/expectation.cc
+++ b/base/test/expectations/expectation.cc
@@ -51,7 +51,8 @@ static bool IsValidPlatform(const Platform* platform) {
         variant != "10.7" &&
         variant != "10.8" &&
         variant != "10.9" &&
-        variant != "10.10") {
+        variant != "10.10" &&
+        variant != "10.11") {
       return false;
     }
   } else if (name == "Linux") {
@@ -114,6 +115,8 @@ Platform GetCurrentPlatform() {
     platform.variant = "10.9";
   else if (base::mac::IsOSYosemite())
     platform.variant = "10.10";
+  else if (base::mac::IsOSElCapitan())
+    platform.variant = "10.11";
 #elif defined(OS_CHROMEOS)
   platform.name = "ChromeOS";
 #elif defined(OS_ANDROID)