[Autofill Assistant] Show cancellable snackbar when stopping AA.

Screenshot: https://screenshot.googleplex.com/kgCWVfNQx5e.png
Issue: b/118246783

Bug: 806868
Change-Id: I20f38afdbcdeb66c14b747aaa7b92f03ebf460a6
Reviewed-on: https://chromium-review.googlesource.com/c/1299159Reviewed-by: Theresa <twellington@chromium.org>
Reviewed-by: Mathias Carlen <mcarlen@chromium.org>
Commit-Queue: Jordan Demeulenaere <jdemeulenaere@chromium.org>
Cr-Commit-Position: refs/heads/master@{#603104}

chrome/android/java/src/org/chromium/chrome/browser/autofill_assistant/AutofillAssistantUiDelegate.java

@@ -29,6 +29,8 @@ import org.chromium.chrome.browser.autofill.PersonalDataManager.AutofillProfile;
 import org.chromium.chrome.browser.autofill.PersonalDataManager.CreditCard;
 import org.chromium.chrome.browser.help.HelpAndFeedback;
 import org.chromium.chrome.browser.profiles.Profile;
+import org.chromium.chrome.browser.snackbar.Snackbar;
+import org.chromium.chrome.browser.snackbar.SnackbarManager;
 import org.chromium.chrome.browser.widget.MaterialProgressBar;
 
 import java.io.InputStream;
@@ -192,7 +194,8 @@ class AutofillAssistantUiDelegate {
         mOverlay = mFullContainer.findViewById(R.id.overlay);
         mOverlay.setOnClickListener(unusedView -> mClient.onClickOverlay());
         mBottomBar = mFullContainer.findViewById(R.id.bottombar);
-        mBottomBar.findViewById(R.id.close_button).setOnClickListener(unusedView -> shutdown());
+        mBottomBar.findViewById(R.id.close_button)
+                .setOnClickListener(unusedView -> mClient.onDismiss());
         mBottomBar.findViewById(R.id.feedback_button)
                 .setOnClickListener(unusedView
                         -> HelpAndFeedback.getInstance(mActivity).showFeedback(mActivity,
@@ -227,7 +230,7 @@ class AutofillAssistantUiDelegate {
     }
 
     private void ensureFullContainerIsShown() {
-        if (!mFullContainer.isShown()) mFullContainer.setVisibility(View.VISIBLE);
+        if (!mFullContainer.isShown()) show();
     }
 
     /**
@@ -288,6 +291,27 @@ class AutofillAssistantUiDelegate {
         return chipView;
     }
 
+    public void show() {
+        mFullContainer.setVisibility(View.VISIBLE);
+    }
+
+    public void hide() {
+        mFullContainer.setVisibility(View.GONE);
+    }
+
+    public void showAutofillAssistantStoppedSnackbar(
+            SnackbarManager.SnackbarController controller) {
+        int durationMs = SnackbarManager.DEFAULT_SNACKBAR_DURATION_MS;
+        Snackbar snackBar =
+                Snackbar.make(mActivity.getString(
+                                      R.string.autofill_assistant_stopped, durationMs / 1_000),
+                                controller, Snackbar.TYPE_ACTION,
+                                Snackbar.UMA_AUTOFILL_ASSISTANT_STOP_UNDO)
+                        .setAction(mActivity.getString(R.string.undo), /* actionData= */ null);
+        snackBar.setDuration(durationMs);
+        mActivity.getSnackbarManager().showSnackbar(snackBar);
+    }
+
     /** Called to show overlay. */
     public void showOverlay() {
         mOverlay.setVisibility(View.VISIBLE);
@@ -367,14 +391,6 @@ class AutofillAssistantUiDelegate {
         mProgressBar.setVisibility(View.INVISIBLE);
     }
 
-    /**
-     * Shuts down the Autofill Assistant. The UI disappears and any associated state goes away.
-     */
-    public void shutdown() {
-        mFullContainer.setVisibility(View.GONE);
-        mClient.onDismiss();
-    }
-
     /**
      * Show profiles in the bar.
      *

chrome/android/java/src/org/chromium/chrome/browser/snackbar/Snackbar.java

@@ -76,6 +76,7 @@ public class Snackbar {
     public static final int UMA_FEED_NTP_STREAM = 26;
     public static final int UMA_WEBAPK_PRIVACY_DISCLOSURE = 27;
     public static final int UMA_TWA_PRIVACY_DISCLOSURE = 28;
+    public static final int UMA_AUTOFILL_ASSISTANT_STOP_UNDO = 29;
 
     private SnackbarController mController;
     private CharSequence mText;

chrome/android/java/src/org/chromium/chrome/browser/snackbar/SnackbarManager.java

@@ -58,7 +58,7 @@ public class SnackbarManager implements OnClickListener, InfoBarContainer.InfoBa
         default void onDismissNoAction(Object actionData) { }
     }
 
-    private static final int DEFAULT_SNACKBAR_DURATION_MS = 3000;
+    public static final int DEFAULT_SNACKBAR_DURATION_MS = 3000;
     private static final int ACCESSIBILITY_MODE_SNACKBAR_DURATION_MS = 6000;
 
     // Used instead of the constant so tests can override the value.

chrome/android/java/strings/android_chrome_strings.grd

@@ -3921,6 +3921,10 @@ However, you aren’t invisible. Going private doesn’t hide your browsing from
          Close other incognito tabs
       </message>
 
+      <!-- Autofill Assistant -->
+      <message name="IDS_AUTOFILL_ASSISTANT_STOPPED" desc="Text label that is shown when stopping the Autofill Assistant. DURATION_SECONDS is a number representing a duration in seconds, which is why it is appended with 's'.">
+        Autofill Assistant will stop in <ph name="DURATION_SECONDS">%1$s<ex>3</ex></ph>s…
+      </message>
     </messages>
   </release>
 </grit>

chrome/android/java/strings/android_chrome_strings_grd/IDS_AUTOFILL_ASSISTANT_STOPPED.png.sha1

+dccd747756f872e773b6b728c35bd264656efac2
\ No newline at end of file

tools/metrics/histograms/enums.xml

@@ -46264,6 +46264,7 @@ Called by update_net_trust_anchors.py.-->
   <int value="26" label="FEED_NTP_STREAM"/>
   <int value="27" label="UMA_WEBAPK_PRIVACY_DISCLOSURE"/>
   <int value="28" label="UMA_TWA_PRIVACY_DISCLOSURE"/>
+  <int value="29" label="UMA_AUTOFILL_ASSISTANT_STOP_UNDO"/>
 </enum>
 
 <enum name="SnippetOpenMethod">