Move code about browsing data from PrefServiceBridge to BrowsingDataBridge.

chrome/android/java/src/org/chromium/chrome/browser/preferences/privacy/BrowsingDataBridge.java

+// 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.privacy;
+
+import org.chromium.base.ThreadUtils;
+import org.chromium.base.VisibleForTesting;
+import org.chromium.base.annotations.CalledByNative;
+
+/**
+ * Communicates between ClearBrowsingData, ImportantSitesUtils (C++) and
+ * ClearBrowsingDataPreferences (Java UI).
+ */
+public final class BrowsingDataBridge {
+    private static BrowsingDataBridge sInstance;
+
+    // Object to notify when "clear browsing data" completes.
+    private OnClearBrowsingDataListener mClearBrowsingDataListener;
+
+    /**
+     * Interface for a class that is listening to clear browser data events.
+     */
+    public interface OnClearBrowsingDataListener { public abstract void onBrowsingDataCleared(); }

[gone, 2017/03/24 21:07:04]

git cl format makes some weird choices, I take it?

[dullweber, 2017/03/27 09:43:30]

I just tried git cl format again and it doesn't change anything here. The
"public abstract" isn't neccessary because it is an interface, I removed it but
git cl format still doesn't change anything here.

There are only two formatting changes in
chrome/android/javatests/src/org/chromium/chrome/browser/browsing_data/BrowsingDataRemoverIntegrationTest.java
but that is in code I didn't touch and I'm not sure if it is actually an
improvement so didn't keep it.

+
+    /**
+     * Interface for a class that is fetching important site information.
+     */
+    public interface ImportantSitesCallback {
+        /**
+         * Called when the list of important registerable domains has been fetched from cpp.
+         * See net/base/registry_controlled_domains/registry_controlled_domain.h for more details on
+         * registrable domains and the current list of effective eTLDs.
+         * @param domains Important registerable domains.
+         * @param exampleOrigins Example origins for each domain. These can be used to retrieve
+         *                       favicons.
+         * @param importantReasons Bitfield of reasons why this domain was selected. Pass this back
+         *                         to clearBrowinsgData so we can record metrics.
+         * @param dialogDisabled If the important dialog has been ignored too many times and should
+         *                       not be shown.
+         */
+        @CalledByNative("ImportantSitesCallback")
+        void onImportantRegisterableDomainsReady(String[] domains, String[] exampleOrigins,
+                int[] importantReasons, boolean dialogDisabled);
+    }
+
+    /**
+     * Interface to a class that receives callbacks instructing it to inform the user about other
+     * forms of browsing history.
+     */
+    public interface OtherFormsOfBrowsingHistoryListener {
+        /**
+         * Called by the web history service when it discovers that other forms of browsing history
+         * exist.
+         */
+        @CalledByNative("OtherFormsOfBrowsingHistoryListener")
+        public abstract void enableDialogAboutOtherFormsOfBrowsingHistory();
+
+        /**
+         * Called by the web history service when the conditions for showing the dialog about
+         * other forms of browsing history are met.
+         */
+        @CalledByNative("OtherFormsOfBrowsingHistoryListener")
+        public abstract void showNoticeAboutOtherFormsOfBrowsingHistory();
+    }
+
+    private BrowsingDataBridge() {}
+
+    /**
+     * @return The singleton bridge object.
+     */
+    public static BrowsingDataBridge getInstance() {
+        ThreadUtils.assertOnUiThread();
+        if (sInstance == null) sInstance = new BrowsingDataBridge();
+        return sInstance;
+    }
+
+    /**
+     * @return Whether the bridge have been initialized.
+     */
+    public static boolean isInitialized() {
+        return sInstance != null;

[gone, 2017/03/24 21:07:04]

Should this be on the UI thread, too?

[dullweber, 2017/03/27 09:43:30]

I noticed that this method isn't called at all, so I removed it.

+    }
+
+    @CalledByNative
+    private void browsingDataCleared() {
+        if (mClearBrowsingDataListener != null) {
+            mClearBrowsingDataListener.onBrowsingDataCleared();
+            mClearBrowsingDataListener = null;
+        }
+    }
+
+    /**
+     * Clear the specified types of browsing data asynchronously.
+     * |listener| is an object to be notified when clearing completes.
+     * It can be null, but many operations (e.g. navigation) are
+     * ill-advised while browsing data is being cleared.
+     * @param listener A listener to call back when the clearing is finished.
+     * @param dataTypes An array of browsing data types to delete, represented as values from
+     *      the shared enum {@link org.chromium.chrome.browser.browsing_data.BrowsingDataType}.

[gone, 2017/03/24 21:07:04]

Fix indentation here and onwards? e.g. line up "the" under "An"

[dullweber, 2017/03/27 09:43:30]

Done.

+     * @param timePeriod The time period for which to delete the data, represented as a value from
+     *      the shared enum {@link org.chromium.chrome.browser.browsing_data.TimePeriod}.
+     */
+    public void clearBrowsingData(
+            OnClearBrowsingDataListener listener, int[] dataTypes, int timePeriod) {
+        clearBrowsingDataExcludingDomains(listener, dataTypes, timePeriod, new String[0],
+                new int[0], new String[0], new int[0]);
+    }
+
+    /**
+     * Same as above, but now we can specify a list of domains to exclude from clearing browsing
+     * data.
+     * Do not use this method unless caller knows what they're doing. Not all backends are supported
+     * yet, and more data than expected could be deleted. See crbug.com/113621.
+     * @param listener A listener to call back when the clearing is finished.
+     * @param dataTypes An array of browsing data types to delete, represented as values from
+     *      the shared enum {@link org.chromium.chrome.browser.browsing_data.BrowsingDataType}.
+     * @param timePeriod The time period for which to delete the data, represented as a value from
+     *      the shared enum {@link org.chromium.chrome.browser.browsing_data.TimePeriod}.
+     * @param blacklistDomains A list of registerable domains that we don't clear data for.
+     * @param blacklistedDomainReasons A list of the reason metadata for the blacklisted domains.
+     * @param ignoredDomains A list of ignored domains that the user chose to not blacklist. We use
+     *                       these to remove important site entries if the user ignores them enough.
+     * @param ignoredDomainReasons A list of reason metadata for the ignored domains.
+     */
+    public void clearBrowsingDataExcludingDomains(OnClearBrowsingDataListener listener,
+            int[] dataTypes, int timePeriod, String[] blacklistDomains,
+            int[] blacklistedDomainReasons, String[] ignoredDomains, int[] ignoredDomainReasons) {
+        assert mClearBrowsingDataListener == null;
+        mClearBrowsingDataListener = listener;
+        nativeClearBrowsingData(dataTypes, timePeriod, blacklistDomains, blacklistedDomainReasons,
+                ignoredDomains, ignoredDomainReasons);
+    }
+
+    /**
+     * This fetches sites (registerable domains) that we consider important. This combines many
+     * pieces of information, including site engagement and permissions. The callback is called
+     * with the list of important registerable domains.
+     *
+     * See net/base/registry_controlled_domains/registry_controlled_domain.h for more details on
+     * registrable domains and the current list of effective eTLDs.
+     * @param callback The callback that will be used to set the list of important sites.
+     */
+    public static void fetchImportantSites(ImportantSitesCallback callback) {
+        nativeFetchImportantSites(callback);
+    }
+
+    /**
+     * @return The maximum number of important sites that will be returned from the call above.
+     *         This is a constant that won't change.
+     */
+    public static int getMaxImportantSites() {
+        return nativeGetMaxImportantSites();
+    }
+
+    /** This lets us mark an origin as important for testing. */
+    @VisibleForTesting
+    public static void markOriginAsImportantForTesting(String origin) {
+        nativeMarkOriginAsImportantForTesting(origin);
+    }
+
+    /**
+     * Requests that the web history service finds out if we should inform the user about the
+     * existence of other forms of browsing history. The response will be asynchronous, through
+     * {@link OtherFormsOfBrowsingHistoryListener}.
+     */
+    public void requestInfoAboutOtherFormsOfBrowsingHistory(
+            OtherFormsOfBrowsingHistoryListener listener) {
+        nativeRequestInfoAboutOtherFormsOfBrowsingHistory(listener);
+    }
+
+    private native void nativeClearBrowsingData(int[] dataTypes, int timePeriod,
+            String[] blacklistDomains, int[] blacklistedDomainReasons, String[] ignoredDomains,
+            int[] ignoredDomainReasons);
+    private native void nativeRequestInfoAboutOtherFormsOfBrowsingHistory(
+            OtherFormsOfBrowsingHistoryListener listener);
+    private static native void nativeFetchImportantSites(ImportantSitesCallback callback);
+    private static native int nativeGetMaxImportantSites();
+    private static native void nativeMarkOriginAsImportantForTesting(String origin);
+}