Make chrome_shell_apk build

sync/android/BUILD.gn

Index: sync/android/BUILD.gn
diff --git a/sync/android/BUILD.gn b/sync/android/BUILD.gn
new file mode 100644
index 0000000000000000000000000000000000000000..fb9dde2ab5ebd252122291bd68356d5cdbcef609
--- /dev/null
+++ b/sync/android/BUILD.gn
@@ -0,0 +1,31 @@
+# Copyright 2014 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import("//build/config/android/rules.gni")
+
+android_library("sync_java") {
+  deps = [
+    "//base:base_java",
+    "//net/android:net_java",
+    "//third_party/cacheinvalidation:cacheinvalidation_javalib",
+    "//third_party/cacheinvalidation:cacheinvalidation_proto_java",
+    "//third_party/jsr-305:jsr_305_javalib",
+    "//third_party/android_tools:android_gcm_java",
+  ]
+  DEPRECATED_java_in_dir = "java/src"
+}
+
+android_library("sync_javatests") {
+  testonly = true
+  deps = [
+    ":sync_java",
+    "//base:base_java",
+    "//base:base_java_test_support",
+    "//sync:sync_java_test_support",
+    "//third_party/cacheinvalidation:cacheinvalidation_javalib",
+    "//third_party/cacheinvalidation:cacheinvalidation_proto_java",
+    "//third_party/jsr-305:jsr_305_javalib",
+  ]
+  DEPRECATED_java_in_dir = "javatests/src"
+}