[sync] Add java InvalidationController for Android.

sync/sync.gyp

Index: sync/sync.gyp
diff --git a/sync/sync.gyp b/sync/sync.gyp
index c22fec10a2eab2c42a1ce8f74b96b5a38e8e163f..7caf784304d1db9bb99a9d016cc65bae8023e972 100644
--- a/sync/sync.gyp
+++ b/sync/sync.gyp
@@ -986,6 +986,37 @@
         },
       ],
     }],
+    ['OS == "android"', {
+      'targets': [
+        {
+          'target_name': 'sync_java',
+          'type': 'none',
+          'variables': {
+            'package_name': 'sync',
+            'java_in_dir': '../sync/android/java',
+          },
+          'dependencies': [
+            '../third_party/cacheinvalidation/cacheinvalidation.gyp:cacheinvalidation_javalib',
+            '../third_party/guava/guava.gyp:guava_javalib',
+            '../third_party/jsr-305/jsr-305.gyp:jsr_305_javalib',
+          ],
+          'includes': [ '../build/java.gypi' ],
+        },
+        {
+          'target_name': 'sync_javatests',
+          'type': 'none',
+          'variables': {
+            'package_name': 'sync_javatests',
+            'java_in_dir': '../sync/android/javatests',
+          },
+          'dependencies': [
+            'sync_java',
+            '../base/base.gyp:base_java_test_support',
+          ],
+          'includes': [ '../build/java.gypi' ],
+        },
+      ],
+    }],
 
     # Special target to wrap a gtest_target_type==shared_library
     # sync_unit_tests into an android apk for execution.