Move UserAgentRule to httpd.raw and delete gwtexpui.linker.server

This class is only used in one place, so move it there. After this
commit, there is no more server-related code in gwtexpui, so it should
be safe to delete those directories wholesale when the GWT UI is
removed.

Change-Id: Ia236f9fc516ec65c46663e34fe89ddb330ef0931

java/com/google/gerrit/httpd/BUILD

@@ -18,7 +18,6 @@ java_library(
         "//java/com/google/gerrit/server/restapi",
         "//java/com/google/gerrit/util/cli",
         "//java/com/google/gerrit/util/http",
-        "//java/com/google/gwtexpui/linker:server",
         "//java/org/eclipse/jgit:server",
         "//lib:args4j",
         "//lib:gson",

java/com/google/gerrit/httpd/raw/RecompileGwtUiFilter.java

@@ -14,7 +14,6 @@
 
 package com.google.gerrit.httpd.raw;
 
-import com.google.gwtexpui.linker.server.UserAgentRule;
 import java.io.File;
 import java.io.IOException;
 import java.io.InputStream;

java/com/google/gerrit/httpd/raw/UserAgentRule.java

@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package com.google.gwtexpui.linker.server;
+package com.google.gerrit.httpd.raw;
 
 import static java.util.regex.Pattern.compile;
 
@@ -28,15 +28,15 @@ import javax.servlet.http.HttpServletRequest;
  *
  * <p>Ported from JavaScript in {@code com.google.gwt.user.UserAgent.gwt.xml}.
  */
-public class UserAgentRule {
+class UserAgentRule {
   private static final Pattern msie = compile(".*msie ([0-11]+)\\.([0-11]+).*");
   private static final Pattern gecko = compile(".*rv:([0-9]+)\\.([0-9]+).*");
 
-  public String getName() {
+  String getName() {
     return "user.agent";
   }
 
-  public String select(HttpServletRequest req) {
+  String select(HttpServletRequest req) {
     String ua = req.getHeader("User-Agent");
     if (ua == null) {
       return null;

java/com/google/gerrit/pgm/BUILD

@@ -43,7 +43,6 @@ java_library(
         "//java/com/google/gerrit/server/schema",
         "//java/com/google/gerrit/sshd",
         "//java/com/google/gerrit/util/http",
-        "//java/com/google/gwtexpui/linker:server",
         "//lib:args4j",
         "//lib:guava",
         "//lib:gwtorm",

java/com/google/gwtexpui/linker/BUILD

@@ -1,6 +0,0 @@
-java_library(
-    name = "server",
-    srcs = glob(["server/*.java"]),
-    visibility = ["//visibility:public"],
-    deps = ["//lib:servlet-api-3_1"],
-)