Copy and view saved passwords.

chrome/android/java/src/org/chromium/chrome/browser/preferences/password/PasswordReauthenticationFragment.java

Index: chrome/android/java/src/org/chromium/chrome/browser/preferences/password/PasswordReauthenticationFragment.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/preferences/password/PasswordReauthenticationFragment.java b/chrome/android/java/src/org/chromium/chrome/browser/preferences/password/PasswordReauthenticationFragment.java
new file mode 100644
index 0000000000000000000000000000000000000000..a859d6d6d8059fe1cdffe716fdffd23eabafb9ca
--- /dev/null
+++ b/chrome/android/java/src/org/chromium/chrome/browser/preferences/password/PasswordReauthenticationFragment.java
@@ -0,0 +1,70 @@
+// Copyright 2017 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 org.chromium.chrome.browser.preferences.password;
+
+import android.annotation.TargetApi;
+import android.app.Fragment;
+import android.app.FragmentManager;
+import android.app.KeyguardManager;
+import android.content.Context;
+import android.content.Intent;
+import android.os.Build;
+import android.os.Build.VERSION_CODES;
+import android.os.Bundle;
+
+import org.chromium.chrome.R;
+
+/** Show the lock screen confirmation and lock the screen. */
+public class PasswordReauthenticationFragment extends Fragment {
+    protected static final int CONFIRM_DEVICE_CREDENTIAL_REQUEST_CODE = 2;
+
+    private boolean mPreventLockDevice;
+
+    private FragmentManager mFragmentManager;
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        mFragmentManager = getFragmentManager();
+        if (!mPreventLockDevice) {
+            lockDevice();
+        }
+    }
+
+    @Override
+    public void onActivityResult(int requestCode, int resultCode, Intent data) {
+        super.onActivityResult(requestCode, resultCode, data);
+        if (requestCode == CONFIRM_DEVICE_CREDENTIAL_REQUEST_CODE) {
+            if (resultCode == getActivity().RESULT_OK) {
+                SavePasswordsPreferences.setLastReauthTimeMillis(System.currentTimeMillis());
+                mFragmentManager.popBackStack();
+            }
+        }
+    }
+
+    /**
+     * Prevent calling the {@link #lockDevice} method in {@link #onCreate}.
+     */
+    public void preventLockingForTesting(boolean preventLockDevice) {
+        mPreventLockDevice = preventLockDevice;
+    }
+
+    /**
+     * Should only be called on Lollipop or above devices.
+     */
+    @TargetApi(VERSION_CODES.LOLLIPOP)
+    private void lockDevice() {
+        assert Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP;
+        KeyguardManager keyguardManager =
+                (KeyguardManager) getActivity().getSystemService(Context.KEYGUARD_SERVICE);
+        Intent intent = keyguardManager.createConfirmDeviceCredentialIntent(
+                null /* title */, getString(R.string.lockscreen_description) /* description */);
+        if (intent != null) {
+            startActivityForResult(intent, CONFIRM_DEVICE_CREDENTIAL_REQUEST_CODE);
+            return;
+        }
+        mFragmentManager.popBackStackImmediate();
+    }
+}