[Passwords] Show toast when screen lock is missing

This change implements showing a toast when to screen lock is set up and
the user wants to edit a compromised password within the Password Check.

Translation Screenshot:
https://storage.cloud.google.com/chromium-translation-screenshots/2d5e2a564fc468f0e58bf4ae9d500d14c5b369e1

Bug: 1114720
Change-Id: Ibdcf22391543916e41b21c7a80a2657b7d64629d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2360272
Commit-Queue: Jan Wilken Dörrie <jdoerrie@chromium.org>
Reviewed-by: Friedrich [CET] <fhorschig@chromium.org>
Cr-Commit-Position: refs/heads/master@{#799018}

chrome/browser/password_check/android/internal/java/src/org/chromium/chrome/browser/password_check/PasswordCheckMediator.java

@@ -142,7 +142,7 @@ class PasswordCheckMediator
     @Override
     public void onEdit(CompromisedCredential credential) {
         if (!mReauthenticationHelper.canReauthenticate()) {
-            // TODO(crbug.com/1114720): Implement Toast explaining to set-up screen lock.
+            mReauthenticationHelper.showScreenLockToast();
             return;
         }
 

chrome/browser/password_check/android/internal/java/src/org/chromium/chrome/browser/password_check/helper/PasswordCheckReauthenticationHelper.java

@@ -14,6 +14,7 @@ import org.chromium.base.Callback;
 import org.chromium.chrome.browser.password_check.internal.R;
 import org.chromium.chrome.browser.password_manager.settings.ReauthenticationManager;
 import org.chromium.chrome.browser.password_manager.settings.ReauthenticationManager.ReauthScope;
+import org.chromium.ui.widget.Toast;
 
 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
@@ -77,6 +78,15 @@ public class PasswordCheckReauthenticationHelper {
                 descriptionId, View.NO_ID, mFragmentManager, ReauthScope.ONE_AT_A_TIME);
     }
 
+    /**
+     * Shows a toast to the user nudging them to set up a screen lock. Intended to be called in case
+     * {@link #canReauthenticate()} returns false.
+     */
+    public void showScreenLockToast() {
+        Toast.makeText(mContext, R.string.password_check_set_screen_lock_text, Toast.LENGTH_LONG)
+                .show();
+    }
+
     /**
      * Invoked when a reauthentication might have happened. Invokes {@link Callback#onResult}
      * with whether the user passed the reauthentication challenge.

chrome/browser/password_check/android/internal/java/strings/android_password_check_strings.grd

@@ -254,6 +254,11 @@
         Edit password
       </message>
 
+      <!-- Password Check Toast strings -->
+      <message name="IDS_PASSWORD_CHECK_SET_SCREEN_LOCK_TEXT" desc="Text prompting user to set a screen lock in order to view or edit their compromised passwords.">
+        To view or edit your password here, set screen lock on this device.
+      </message>
+
       <!-- Lock Screen Fragment strings  -->
       <message name="IDS_PASSWORD_CHECK_LOCKSCREEN_DESCRIPTION_VIEW" desc="When a user attempts to view a compromised password for a particular website, Chrome launches a lock screen to verify the user's identity and displays the following explanation.">
         Unlock to view password

chrome/browser/password_check/android/internal/java/strings/android_password_check_strings_grd/IDS_PASSWORD_CHECK_SET_SCREEN_LOCK_TEXT.png.sha1

+2d5e2a564fc468f0e58bf4ae9d500d14c5b369e1
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