[Android WebView] Call shouldInterceptRequest on a background thread

android_webview/native/webview_native.gyp

 # 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.
 {
   'variables': {
     'chromium_code': 1,
   },
   'targets': [
     {
       'target_name': 'webview_native',
@@ skipping 25 matching lines @@
         'android_protocol_handler.cc',
         'android_protocol_handler.h',
         'android_webview_jni_registrar.cc',
         'android_webview_jni_registrar.h',
         'aw_autofill_client.cc',
         'aw_autofill_client.h',
         'aw_browser_dependency_factory.cc',
         'aw_browser_dependency_factory.h',
         'aw_contents.cc',
         'aw_contents.h',
+        'aw_contents_background_thread_client.cc',
+        'aw_contents_background_thread_client.h',
         'aw_contents_client_bridge.cc',
         'aw_contents_client_bridge.h',
         'aw_contents_io_thread_client_impl.cc',
         'aw_contents_io_thread_client_impl.h',
         'aw_contents_statics.cc',
         'aw_contents_statics.h',
         'aw_dev_tools_server.cc',
         'aw_dev_tools_server.h',
         'aw_form_database.cc',
         'aw_form_database.h',
@@ skipping 62 matching lines @@
       },
       'includes': [ '../../build/jar_file_jni_generator.gypi' ],
     },
     {
       'target_name': 'android_webview_native_jni',
       'type': 'none',
       'sources': [
           '../java/src/org/chromium/android_webview/AndroidProtocolHandler.java',
           '../java/src/org/chromium/android_webview/AwAutofillClient.java',
           '../java/src/org/chromium/android_webview/AwContents.java',
+          '../java/src/org/chromium/android_webview/AwContentsBackgroundThreadClient.java',
           '../java/src/org/chromium/android_webview/AwContentsClientBridge.java',
           '../java/src/org/chromium/android_webview/AwContentsIoThreadClient.java',
           '../java/src/org/chromium/android_webview/AwContentsStatics.java',
           '../java/src/org/chromium/android_webview/AwCookieManager.java',
           '../java/src/org/chromium/android_webview/AwDevToolsServer.java',
           '../java/src/org/chromium/android_webview/AwFormDatabase.java',
           '../java/src/org/chromium/android_webview/AwHttpAuthHandler.java',
           '../java/src/org/chromium/android_webview/AwMessagePortService.java',
           '../java/src/org/chromium/android_webview/AwPdfExporter.java',
           '../java/src/org/chromium/android_webview/AwPicture.java',
@@ skipping 17 matching lines @@
     {
       'target_name': 'android_webview_aw_permission_request_resource',
       'type': 'none',
       'variables': {
         'source_file': 'permission/aw_permission_request.h',
       },
       'includes': [ '../../build/android/java_cpp_enum.gypi' ],
     },
   ],
 }