[Android WebView] Add an API to toggle the JS navigator.online property

android_webview/native/aw_contents.cc

Index: android_webview/native/aw_contents.cc
diff --git a/android_webview/native/aw_contents.cc b/android_webview/native/aw_contents.cc
index e6cf84111a1b4098d9374cb2ab6d15a93cc37173..dd8db0a43d62b20fe520441fc1157b3d888e1cab 100644
--- a/android_webview/native/aw_contents.cc
+++ b/android_webview/native/aw_contents.cc
@@ -780,4 +780,10 @@ void AwContents::EnableOnNewPicture(JNIEnv* env,
   browser_view_renderer_->EnableOnNewPicture(enabled);
 }
 
+void AwContents::SetJsOnlineProperty(JNIEnv* env,
+                                     jobject obj,
+                                     jboolean network_up) {
+  render_view_host_ext_->SetJsOnlineProperty(network_up);
+}
+
 }  // namespace android_webview