Replace Throwables.propagate with equivalent rethrows.

Committed on behalf of the Guava team, who are trying to eliminate
Throwables.propagate, especially for trivial throws like this one.

java/client/test/org/openqa/selenium/testing/drivers/OutOfProcessSeleniumServer.java

@@ -17,9 +17,10 @@
 
 package org.openqa.selenium.testing.drivers;
 
-import com.google.common.base.Throwables;
+import static java.util.concurrent.TimeUnit.SECONDS;
 
 import com.google.common.io.Files;
+
 import org.openqa.selenium.Build;
 import org.openqa.selenium.Capabilities;
 import org.openqa.selenium.net.NetworkUtils;
@@ -38,8 +39,6 @@
 import java.util.List;
 import java.util.logging.Logger;
 
-import static java.util.concurrent.TimeUnit.SECONDS;
-
 public class OutOfProcessSeleniumServer {
 
   private static final Logger log = Logger.getLogger(OutOfProcessSeleniumServer.class.getName());
@@ -97,9 +96,9 @@ public OutOfProcessSeleniumServer start() {
       log.info("Server is ready");
     } catch (UrlChecker.TimeoutException e) {
       log.severe("Server failed to start: " + e.getMessage());
-      throw Throwables.propagate(e);
+      throw new RuntimeException(e);
     } catch (MalformedURLException e) {
-      throw Throwables.propagate(e);
+      throw new RuntimeException(e);
     }
 
     return this;