[Android] Show document mode opt-out InfoBar on selected devices.

chrome/android/java/src/org/chromium/chrome/browser/infobar/DocumentModeOptOutInfoBarDelegate.java

+// Copyright 2015 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.infobar;
+
+import android.content.Context;
+import android.preference.PreferenceManager;
+
+import org.chromium.base.ApplicationStatus;
+import org.chromium.base.annotations.CalledByNative;
+import org.chromium.chrome.browser.document.DocumentMigrationHelper;
+import org.chromium.chrome.browser.preferences.DocumentModeManager;
+import org.chromium.chrome.browser.tab.Tab;
+import org.chromium.chrome.browser.util.FeatureUtilities;
+import org.chromium.components.variations.VariationsAssociatedData;
+
+/**
+ * Handles InfoBar requesting document mode opt-out for the devices that document mode is
+ * inconvenient to use.
+ */
+public class DocumentModeOptOutInfoBarDelegate {
+
+    private static final String USER_INTERACTED_WITH_DOCUMENT_MODE_OPT_OUT_INFOBAR =
+            "user_interacted_document_mode_opt_out_infobar";
+    private static final String FIELD_TRIAL_NAME = "DocumentModeOptOutInfoBar";
+    private static final String FIELD_TRIAL_PARAM_ENABLED = "enabled";
+
+    private Context mContext;
+
+    private DocumentModeOptOutInfoBarDelegate(Context context) {
+        mContext = context;
+    }
+
+    /**
+     * Show document mode opt-out promotion InfoBar if all the required conditions are met.
+     * @param context Context for checking preconditions and showing InfoBar.
+     * @param tab Tab that InfoBar should be shown.
+     */
+    public static void showIfNecessary(Context context, Tab tab) {
+        if (FeatureUtilities.isDocumentMode(context)
+                && DocumentModeManager.isDeviceTabbedModeByDefault()
+                && !PreferenceManager.getDefaultSharedPreferences(context)
+                        .getBoolean(USER_INTERACTED_WITH_DOCUMENT_MODE_OPT_OUT_INFOBAR, false)
+                && VariationsAssociatedData
+                        .getVariationParamValue(FIELD_TRIAL_NAME, FIELD_TRIAL_PARAM_ENABLED)
+                        .equals("enabled")) {
+            DocumentModeOptOutInfoBarDelegate delegate =
+                    new DocumentModeOptOutInfoBarDelegate(context);
+            delegate.nativeShowDocumentModeOptOutInfoBar(tab);
+        }
+    }
+
+    private void recordUserInteraction() {
+        PreferenceManager.getDefaultSharedPreferences(mContext).edit()
+                .putBoolean(USER_INTERACTED_WITH_DOCUMENT_MODE_OPT_OUT_INFOBAR, true).commit();
+    }
+
+    @CalledByNative
+    private void accept() {
+        recordUserInteraction();
+        DocumentMigrationHelper.migrateTabs(false,
+                ApplicationStatus.getLastTrackedFocusedActivity(), true);
+    }
+
+    @CalledByNative
+    private void cancel() {
+        recordUserInteraction();
+    }
+
+    private native long nativeShowDocumentModeOptOutInfoBar(Tab tab);
+}