[WebLayer] Add option to WebLayer shell to clear browsing data

This is useful for testing any features that may need browsing data
cleared.

Change-Id: I5dfdcb90bc1f0ce03799da4eca71965bfd6dd398
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2283259
Reviewed-by: Scott Violet <sky@chromium.org>
Commit-Queue: Clark DuVall <cduvall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#785594}

weblayer/shell/android/shell_apk/res/menu/app_menu.xml

@@ -19,4 +19,6 @@
         android:title="Site Settings" />
     <item android:id="@+id/translate_menu_id"
         android:title="Translate" />
+    <item android:id="@+id/clear_browsing_data_menu_id"
+        android:title="Clear all browsing data" />
 </menu>

weblayer/shell/android/shell_apk/src/org/chromium/weblayer/shell/WebLayerShellActivity.java

@@ -27,6 +27,7 @@
 import android.widget.PopupMenu;
 import android.widget.ProgressBar;
 import android.widget.TextView;
+import android.widget.Toast;
 import android.widget.ViewSwitcher;
 
 import androidx.fragment.app.Fragment;
@@ -37,6 +38,7 @@
 import org.chromium.base.CommandLine;
 import org.chromium.base.IntentUtils;
 import org.chromium.weblayer.Browser;
+import org.chromium.weblayer.BrowsingDataType;
 import org.chromium.weblayer.ContextMenuParams;
 import org.chromium.weblayer.ErrorPageCallback;
 import org.chromium.weblayer.FindInPageCallback;
@@ -227,6 +229,16 @@ protected void onCreate(final Bundle savedInstanceState) {
                     return true;
                 }
 
+                if (item.getItemId() == R.id.clear_browsing_data_menu_id) {
+                    mProfile.clearBrowsingData(new int[] {BrowsingDataType.COOKIES_AND_SITE_DATA,
+                                                       BrowsingDataType.CACHE},
+                            () -> {
+                                Toast.makeText(getApplicationContext(), "Data cleared!",
+                                             Toast.LENGTH_SHORT)
+                                        .show();
+                            });
+                }
+
                 return false;
             });
             popup.show();