Dissolve gerrit-extension-api top-level directory

Change-Id: I47a130d3203cf45ce09f2a44e81449c55eaa693b

java/com/google/gerrit/extensions/BUILD

@@ -0,0 +1,61 @@
+load("//lib:guava.bzl", "GUAVA_DOC_URL")
+load("//lib/jgit:jgit.bzl", "JGIT_DOC_URL")
+load("//tools/bzl:gwt.bzl", "gwt_module")
+
+SRCS = glob(["**/*.java"])
+
+EXT_API_SRCS = glob(["client/*.java"])
+
+gwt_module(
+    name = "client",
+    srcs = EXT_API_SRCS,
+    gwt_xml = "Extensions.gwt.xml",
+    visibility = ["//visibility:public"],
+)
+
+java_binary(
+    name = "extension-api",
+    main_class = "Dummy",
+    visibility = ["//visibility:public"],
+    runtime_deps = [":lib"],
+)
+
+java_library(
+    name = "lib",
+    visibility = ["//visibility:public"],
+    exports = [
+        ":api",
+        "//lib:guava",
+        "//lib:servlet-api-3_1",
+        "//lib/guice",
+        "//lib/guice:guice-assistedinject",
+        "//lib/guice:guice-servlet",
+    ],
+)
+
+#TODO(davido): There is no provided_deps argument to java_library rule
+java_library(
+    name = "api",
+    srcs = glob(["**/*.java"]),
+    visibility = ["//visibility:public"],
+    deps = [
+        "//gerrit-common:annotations",
+        "//lib:guava",
+        "//lib/guice",
+        "//lib/guice:guice-assistedinject",
+    ],
+)
+
+load("//tools/bzl:javadoc.bzl", "java_doc")
+
+java_doc(
+    name = "extension-api-javadoc",
+    external_docs = [
+        JGIT_DOC_URL,
+        GUAVA_DOC_URL,
+    ],
+    libs = [":api"],
+    pkgs = ["com.google.gerrit.extensions"],
+    title = "Gerrit Review Extension API Documentation",
+    visibility = ["//visibility:public"],
+)