Android webview tries to switch to CE context

android_webview/glue/java/src/com/android/webview/chromium/WebViewChromiumFactoryProvider.java

 // 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.
 
 package com.android.webview.chromium;
 
 import android.Manifest;
 import android.app.ActivityManager;
 import android.content.ComponentCallbacks2;
 import android.content.Context;
 import android.content.Intent;
 import android.content.SharedPreferences;
 import android.content.pm.PackageInfo;
 import android.content.pm.PackageManager;
 import android.content.pm.PackageManager.NameNotFoundException;
 import android.net.Uri;
 import android.os.Build;
 import android.os.Looper;
 import android.os.Process;
 import android.os.StrictMode;
+import android.os.UserManager;
 import android.provider.Settings;
 import android.util.Log;
 import android.webkit.CookieManager;
 import android.webkit.GeolocationPermissions;
 import android.webkit.ServiceWorkerController;
 import android.webkit.TokenBindingService;
 import android.webkit.WebStorage;
 import android.webkit.WebView;
 import android.webkit.WebViewDatabase;
 import android.webkit.WebViewFactory;
@@ skipping 160 matching lines @@
     /**
      * Constructor called by the API 22 version of {@link WebViewFactory} and later.
      */
     public WebViewChromiumFactoryProvider(android.webkit.WebViewDelegate delegate) {
         initialize(WebViewDelegateFactory.createProxyDelegate(delegate));
     }
 
     @SuppressFBWarnings("DMI_HARDCODED_ABSOLUTE_FILENAME")
     private void initialize(WebViewDelegate webViewDelegate) {
         mWebViewDelegate = webViewDelegate;
+        Context ctx = mWebViewDelegate.getApplication().getApplicationContext();
 
-        checkStorageIsNotDeviceProtected(mWebViewDelegate.getApplication());
+        // If the application context is DE, but we have credentials, use a CE context instead
+        try {
+            checkStorageIsNotDeviceProtected(mWebViewDelegate.getApplication());
+        } catch (IllegalArgumentException e) {
+            if (!ctx.getSystemService(UserManager.class).isUserUnlocked()) {
+                throw e;
+            }
+            ctx = ctx.createCredentialProtectedStorageContext();
+        }
 
         // WebView needs to make sure to always use the wrapped application context.
-        ContextUtils.initApplicationContext(
-                ResourcesContextWrapperFactory.get(
-                        mWebViewDelegate.getApplication().getApplicationContext()));
+        ContextUtils.initApplicationContext(ResourcesContextWrapperFactory.get(ctx));
 
         if (isBuildDebuggable()) {
             // Suppress the StrictMode violation as this codepath is only hit on debuggable builds.
             StrictMode.ThreadPolicy oldPolicy = StrictMode.allowThreadDiskReads();
             CommandLine.initFromFile(COMMAND_LINE_FILE);
             StrictMode.setThreadPolicy(oldPolicy);
         } else {
             CommandLine.init(null);
         }
 
@@ skipping 428 matching lines @@
                 mWebViewDatabase = new WebViewDatabaseAdapter(this, awDatabase);
             }
         }
         return mWebViewDatabase;
     }
 
     WebViewDelegate getWebViewDelegate() {
         return mWebViewDelegate;
     }
 }