[Android WebView] Call shouldInterceptRequest on a background thread

android_webview/android_webview.gyp

Index: android_webview/android_webview.gyp
diff --git a/android_webview/android_webview.gyp b/android_webview/android_webview.gyp
index 6618c3b9fd4c99352edfdaec27aaa9badf0d4b93..aceabd9eac74f6cc5ac647c48ffbb75a11907686 100644
--- a/android_webview/android_webview.gyp
+++ b/android_webview/android_webview.gyp
@@ -274,8 +274,6 @@
         'browser/aw_quota_permission_context.h',
         'browser/aw_render_thread_context_provider.cc',
         'browser/aw_render_thread_context_provider.h',
-        'browser/aw_request_interceptor.cc',
-        'browser/aw_request_interceptor.h',
         'browser/aw_resource_context.cc',
         'browser/aw_resource_context.h',
         'browser/aw_ssl_host_state_delegate.cc',
@@ -283,8 +281,6 @@
         'browser/aw_result_codes.h',
         'browser/aw_web_preferences_populater.cc',
         'browser/aw_web_preferences_populater.h',
-        'browser/aw_web_resource_response.cc',
-        'browser/aw_web_resource_response.h',
         'browser/browser_view_renderer.cc',
         'browser/browser_view_renderer.h',
         'browser/browser_view_renderer_client.h',
@@ -308,10 +304,13 @@
         'browser/net/aw_http_user_agent_settings.cc',
         'browser/net/aw_network_delegate.cc',
         'browser/net/aw_network_delegate.h',
+        'browser/net/aw_request_interceptor.cc',
+        'browser/net/aw_request_interceptor.h',
         'browser/net/aw_url_request_context_getter.cc',
         'browser/net/aw_url_request_context_getter.h',
         'browser/net/aw_url_request_job_factory.cc',
         'browser/net/aw_url_request_job_factory.h',
+        'browser/net/aw_web_resource_response.h',
         'browser/net_disk_cache_remover.cc',
         'browser/net_disk_cache_remover.h',
         'browser/net/init_native_callback.h',