[chromedriver] Return session not created error if version check fails.

chrome/test/chromedriver/chrome_launcher.cc

Index: chrome/test/chromedriver/chrome_launcher.cc
diff --git a/chrome/test/chromedriver/chrome_launcher.cc b/chrome/test/chromedriver/chrome_launcher.cc
index 1592c2913c813c10936865934ba31f80edf66884..a979be476733f657dfef7677421a275c9710c464 100644
--- a/chrome/test/chromedriver/chrome_launcher.cc
+++ b/chrome/test/chromedriver/chrome_launcher.cc
@@ -222,8 +222,9 @@ Status WaitForDevToolsAndCheckVersion(
                     "--disable-build-check. Please don't report bugs that "
                     "cannot be reproduced with this switch removed.";
   } else if (browser_info->build_no < kMinimumSupportedChromeBuildNo) {
-    return Status(kUnknownError, "Chrome version must be >= " +
-        GetMinimumSupportedChromeVersion());
+    return Status(
+        kSessionNotCreatedException,
+        "Chrome version must be >= " + GetMinimumSupportedChromeVersion());
   }
 
   while (base::TimeTicks::Now() < deadline) {