Remove most android_webview_build conditions from build.

build/android/android_exports.gyp

-# 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.
-
-# This target is only used when android_webview_build==1 - it implements a
-# whitelist for exported symbols to minimise the binary size and prevent us
-# accidentally exposing things we don't mean to expose.
-
-{
-  'variables': {
-    'android_linker_script%': '<(SHARED_INTERMEDIATE_DIR)/android_webview_export_whitelist.lst',
-  },
-  'targets': [
-    {
-      'target_name': 'android_exports',
-      'type': 'none',
-      'inputs': [
-        '<(DEPTH)/build/android/android_webview_export_whitelist.lst',
-      ],
-      'outputs': [
-        '<(android_linker_script)',
-      ],
-      'copies': [
-        {
-          'destination': '<(SHARED_INTERMEDIATE_DIR)',
-          'files': [
-            '<@(_inputs)',
-         ],
-        },
-      ],
-      'conditions': [
-        ['component=="static_library"', {
-          'link_settings': {
-            'ldflags': [
-              # Only export symbols that are specified in version script.
-              '-Wl,--version-script=<(android_linker_script)',
-            ],
-          },
-        }],
-      ],
-    },
-  ],
-}