[Android WebView] Filter out error page URL from onPageFinished to un-flake tests

android_webview/native/aw_contents_statics.cc

Index: android_webview/native/aw_contents_statics.cc
diff --git a/android_webview/native/aw_contents_statics.cc b/android_webview/native/aw_contents_statics.cc
index 70525af144ae0d83f7727304bd8695feb1fca7cf..b1fdcbb8dba10a8ddc9df8155f756e45ad506492 100644
--- a/android_webview/native/aw_contents_statics.cc
+++ b/android_webview/native/aw_contents_statics.cc
@@ -10,6 +10,7 @@
 #include "base/callback.h"
 #include "components/data_reduction_proxy/browser/data_reduction_proxy_settings.h"
 #include "content/public/browser/browser_thread.h"
+#include "content/public/common/url_constants.h"
 #include "jni/AwContentsStatics_jni.h"
 #include "net/cert/cert_database.h"
 
@@ -63,6 +64,12 @@ void SetDataReductionProxyEnabled(JNIEnv* env, jclass, jboolean enabled) {
   AwBrowserContext::SetDataReductionProxyEnabled(enabled);
 }
 
+// static
+jstring GetUnreachableWebDataUrl(JNIEnv* env, jclass) {
+  return base::android::ConvertUTF8ToJavaString(
+             env, content::kUnreachableWebDataURL).Release();
+}
+
 bool RegisterAwContentsStatics(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }