Use @GwtIncompatible to exclude files incompatible with GWT

Currently, GWT's Super Dev Mode shows "Ignored 7 units with
compilation errors in first pass". This is because the 6 files listed
in this change refer to classes / methods that are not emulated in GWT
and should be excluded from the compilation. The production build
doesn't suffer from this problem because we exclude them in
gerrit-common/BUCK.

Instead of listing them in BUCK, rely on Guava's handy
@GwtIncompatible annotation. This tells the GWT compiler to ignore the
file entirely, both in Super Dev Mode and production build.

Add "-strict" to the launch configurations of Super Dev Mode so that
developers can catch errors earlier.

Change-Id: I6e2d6be303fa888a9b4776aaae1148d4fd9a211c

gerrit-common/src/main/java/com/google/gerrit/common/FileUtil.java

@@ -14,6 +14,8 @@
 
 package com.google.gerrit.common;
 
+import com.google.common.annotations.GwtIncompatible;
+
 import org.eclipse.jgit.lib.Constants;
 import org.eclipse.jgit.storage.file.FileBasedConfig;
 import org.eclipse.jgit.util.IO;
@@ -25,6 +27,7 @@ import java.nio.file.Files;
 import java.nio.file.Path;
 import java.util.Arrays;
 
+@GwtIncompatible("Unemulated classes in java.io, java.nio and JGit")
 public class FileUtil {
   public static boolean modified(FileBasedConfig cfg) throws IOException {
     byte[] curVers;

gerrit-common/src/main/java/com/google/gerrit/common/IoUtil.java

@@ -14,6 +14,7 @@
 
 package com.google.gerrit.common;
 
+import com.google.common.annotations.GwtIncompatible;
 import com.google.common.collect.Sets;
 
 import java.io.IOException;
@@ -29,6 +30,7 @@ import java.util.Arrays;
 import java.util.Collections;
 import java.util.Set;
 
+@GwtIncompatible("Unemulated methods in Class and OutputStream")
 public final class IoUtil {
   public static void copyWithThread(final InputStream src,
       final OutputStream dst) {

gerrit-common/src/main/java/com/google/gerrit/common/PluginData.java

@@ -14,9 +14,12 @@
 
 package com.google.gerrit.common;
 
+import com.google.common.annotations.GwtIncompatible;
+
 import java.nio.file.Path;
 import java.util.Objects;
 
+@GwtIncompatible("Unemulated java.nio.file.Path")
 public class PluginData {
   public final String name;
   public final String version;

gerrit-common/src/main/java/com/google/gerrit/common/RawInputUtil.java

@@ -16,6 +16,7 @@ package com.google.gerrit.common;
 
 import static java.nio.charset.StandardCharsets.UTF_8;
 
+import com.google.common.annotations.GwtIncompatible;
 import com.google.common.base.Preconditions;
 import com.google.gerrit.extensions.restapi.RawInput;
 
@@ -25,6 +26,7 @@ import java.io.InputStream;
 
 import javax.servlet.http.HttpServletRequest;
 
+@GwtIncompatible("Unemulated classes in java.io and javax.servlet")
 public class RawInputUtil {
   public static RawInput create(String content) {
     return create(content.getBytes(UTF_8));
@@ -52,7 +54,7 @@ public class RawInputUtil {
   }
 
   public static RawInput create(final byte[] bytes) {
-    return create (bytes, "application/octet-stream");
+    return create(bytes, "application/octet-stream");
   }
 
   public static RawInput create(final HttpServletRequest req) {

gerrit-common/src/main/java/com/google/gerrit/common/SiteLibraryLoaderUtil.java

@@ -16,6 +16,7 @@ package com.google.gerrit.common;
 
 import static com.google.gerrit.common.FileUtil.lastModified;
 
+import com.google.common.annotations.GwtIncompatible;
 import com.google.common.collect.ComparisonChain;
 import com.google.common.collect.ImmutableList;
 import com.google.common.collect.Ordering;
@@ -30,6 +31,7 @@ import java.nio.file.NoSuchFileException;
 import java.nio.file.Path;
 import java.util.List;
 
+@GwtIncompatible("Unemulated classes in java.nio and Guava")
 public final class SiteLibraryLoaderUtil {
   private static final Logger log =
       LoggerFactory.getLogger(SiteLibraryLoaderUtil.class);

gerrit-common/src/main/java/com/google/gerrit/common/TimeUtil.java

@@ -14,11 +14,14 @@
 
 package com.google.gerrit.common;
 
+import com.google.common.annotations.GwtIncompatible;
+
 import org.joda.time.DateTimeUtils;
 
 import java.sql.Timestamp;
 
 /** Static utility methods for dealing with dates and times. */
+@GwtIncompatible("Unemulated org.joda.time.DateTimeUtils")
 public class TimeUtil {
   public static long nowMs() {
     return DateTimeUtils.currentTimeMillis();

gerrit-common/src/main/java/com/google/gerrit/common/data/SubscribeSection.java

@@ -14,6 +14,7 @@
 
 package com.google.gerrit.common.data;
 
+import com.google.common.annotations.GwtIncompatible;
 import com.google.gerrit.reviewdb.client.Branch;
 import com.google.gerrit.reviewdb.client.Project;
 
@@ -25,6 +26,7 @@ import java.util.Collections;
 import java.util.List;
 
 /** Portion of a {@link Project} describing superproject subscription rules. */
+@GwtIncompatible("Unemulated org.eclipse.jgit.transport.RefSpec")
 public class SubscribeSection {
 
   private final List<RefSpec> refSpecs;