Remove unneeded JNI registrations.

build/jar_file_jni_generator.gypi

Index: build/jar_file_jni_generator.gypi
diff --git a/build/jar_file_jni_generator.gypi b/build/jar_file_jni_generator.gypi
index dc43c49070d2efe5e1372ba2f62ac66a9beaa461..b5c6e68904d5c293f1bda40e75f602d8b9ddfc8a 100644
--- a/build/jar_file_jni_generator.gypi
+++ b/build/jar_file_jni_generator.gypi
@@ -27,6 +27,9 @@
         'base/android/jni_generator/jni_generator_helper.h'
     ),
   },
+  'dependencies': [
+    '<(DEPTH)/build/linker_script_copy.gyp:linker_script_copy',
+  ],
   'actions': [
     {
       'action_name': 'generate_jni_headers_from_jar_file',
@@ -54,6 +57,7 @@
         '<(jni_generator_includes)',
         '--optimize_generation',
         '<(optimize_jni_generation)',
+        '--native_exports',
       ],
       'message': 'Generating JNI bindings from  <(input_jar_file)/<(input_java_class)',
       'process_outputs_as_sources': 1,
@@ -62,4 +66,17 @@
   # This target exports a hard dependency because it generates header
   # files.
   'hard_dependency': 1,
+  'conditions': [
+    ['component=="static_library"', {
+      'link_settings': {
+        'ldflags': [
+          # Only export symbols that are specified in version script.
+          '-Wl,--version-script=<(android_linker_script)',
+        ],
+        'ldflags!': [
+          '-Wl,--exclude-libs=ALL',
+        ],
+      },
+    }],
+  ],
 }