Don't register JNI methods for the android_webview.

build/jni_generator.gypi

 # Copyright (c) 2012 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.
 
 # This file is meant to be included into a target to provide a rule
 # to generate jni bindings for Java-files in a consistent manner.
 #
 # To use this, create a gyp target with the following form:
 #  {
 #    'target_name': 'base_jni_headers',
@@ skipping 18 matching lines @@
 
 {
   'variables': {
     'jni_generator': '<(DEPTH)/base/android/jni_generator/jni_generator.py',
     'jni_generator_jarjar_file%': '',
     'jni_generator_ptr_type%': 'long',
     # A comma separated string of include files.
     'jni_generator_includes%': (
         'base/android/jni_generator/jni_generator_helper.h'
     ),
+    'native_exports%': '',
   },
+  'dependencies': [
+    '<(DEPTH)/build/linker_script_copy.gyp:linker_script_copy',
+  ],
   'rules': [
     {
       'rule_name': 'generate_jni_headers',
       'extension': 'java',
       'inputs': [
         '<(jni_generator)',
       ],
       'outputs': [
         '<(SHARED_INTERMEDIATE_DIR)/<(jni_gen_package)/jni/<(RULE_INPUT_ROOT)_jni.h',
       ],
       'action': [
         '<(jni_generator)',
         '--input_file',
         '<(RULE_INPUT_PATH)',
         '--output_dir',
         '<(SHARED_INTERMEDIATE_DIR)/<(jni_gen_package)/jni',
         '--includes',
         '<(jni_generator_includes)',
         '--optimize_generation',
         '<(optimize_jni_generation)',
         '--jarjar',
         '<(jni_generator_jarjar_file)',
         '--ptr_type',
         '<(jni_generator_ptr_type)',
+        '<(native_exports)',
       ],
       'message': 'Generating JNI bindings from <(RULE_INPUT_PATH)',
       'process_outputs_as_sources': 1,
       'conditions': [
         ['jni_generator_jarjar_file != ""', {
           'inputs': [
             '<(jni_generator_jarjar_file)',
           ],
         }]
       ],
     },
   ],
   'direct_dependent_settings': {
     'include_dirs': [
       '<(SHARED_INTERMEDIATE_DIR)/<(jni_gen_package)',
     ],
   },
   # This target exports a hard dependency because it generates header
   # files.
   'hard_dependency': 1,
+  'conditions': [
+    ['android_webview_build==1', {
+      'variables': {
+        'native_exports%': '--native_exports',
+      },
+      'dependencies': [
+        '<(DEPTH)/build/linker_script_copy.gyp:linker_script_copy',
+      ],
+      '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',
+            ],
+          },
+        }],
+      ],
+    }],
+  ],
 }
+