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

android_webview/native/aw_contents_statics.cc

 // 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.
 
 #include "android_webview/native/aw_contents_statics.h"
 
 #include "android_webview/browser/aw_browser_context.h"
 #include "base/android/jni_string.h"
 #include "base/android/scoped_java_ref.h"
 #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"
 
 using base::android::AttachCurrentThread;
 using base::android::ConvertJavaStringToUTF8;
 using base::android::ScopedJavaGlobalRef;
 using content::BrowserThread;
 using data_reduction_proxy::DataReductionProxySettings;
 
 namespace android_webview {
@@ skipping 33 matching lines @@
       browser_context->GetDataReductionProxySettings();
   if (drp_settings)
     drp_settings->params()->set_key(ConvertJavaStringToUTF8(env, key));
 }
 
 // static
 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);
 }
 
 }  // namespace android_webview