Upstream oodles of Chrome for Android code into Chromium.

chrome/android/java_staging/src/org/chromium/chrome/browser/omaha/UpdateInfoBarHelper.java

Index: chrome/android/java_staging/src/org/chromium/chrome/browser/omaha/UpdateInfoBarHelper.java
diff --git a/chrome/android/java_staging/src/org/chromium/chrome/browser/omaha/UpdateInfoBarHelper.java b/chrome/android/java_staging/src/org/chromium/chrome/browser/omaha/UpdateInfoBarHelper.java
new file mode 100644
index 0000000000000000000000000000000000000000..fed3985ba8a0665efb3fadb1939f0cae5fef560a
--- /dev/null
+++ b/chrome/android/java_staging/src/org/chromium/chrome/browser/omaha/UpdateInfoBarHelper.java
@@ -0,0 +1,84 @@
+// 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.omaha;
+
+import android.content.res.Resources;
+import android.os.AsyncTask;
+
+import com.google.android.apps.chrome.R;
+
+import org.chromium.base.ThreadUtils;
+import org.chromium.chrome.browser.ChromeActivity;
+import org.chromium.chrome.browser.Tab;
+
+/**
+ * Shows an InfoBar indicating that a new version of Chrome is available.
+ */
+public class UpdateInfoBarHelper {
+    /** Whether OmahaClient has already been checked for an update. */
+    private boolean mAlreadyCheckedForUpdates;
+
+    /** Whether to show the InfoBar indicating a new version is available. */
+    private boolean mMustShowInfoBar;
+
+    /** URL to direct the user to when Omaha detects a newer version available. */
+    private String mUpdateURL;
+
+    /** Checks if the OmahaClient knows about an update. */
+    public void checkForUpdateOnBackgroundThread(final ChromeActivity activity) {
+        ThreadUtils.assertOnUiThread();
+
+        if (mAlreadyCheckedForUpdates) return;
+        mAlreadyCheckedForUpdates = true;
+
+        new AsyncTask<Void, Void, Void>() {
+            @Override
+            protected Void doInBackground(Void... params) {
+                if (OmahaClient.isNewerVersionAvailable(activity)) {
+                    mUpdateURL = OmahaClient.getMarketURL(activity);
+                    mMustShowInfoBar = true;
+                } else {
+                    mMustShowInfoBar = false;
+                }
+                return null;
+            }
+
+            @Override
+            protected void onPostExecute(Void result) {
+                if (activity.isActivityDestroyed()) return;
+                showUpdateInfobarIfNecessary(activity);
+            }
+        }.execute();
+    }
+
+    /** Shows the InfoBar if it needs to be shown. */
+    public void showUpdateInfobarIfNecessary(ChromeActivity activity) {
+        if (mMustShowInfoBar) showUpdateInfoBar(activity);
+    }
+
+    /** Shows an InfoBar indicating that a new version of Chrome is available. */
+    private void showUpdateInfoBar(ChromeActivity activity) {
+        ThreadUtils.assertOnUiThread();
+
+        // Don't show the InfoBar if it doesn't make sense to.
+        Tab currentTab = activity.getActivityTab();
+        boolean tabIsInvalid = currentTab == null || currentTab.isNativePage();
+        boolean mayShowUpdateInfoBar = activity.mayShowUpdateInfoBar();
+        boolean urlIsInvalid = mUpdateURL == null;
+        if (tabIsInvalid || !mayShowUpdateInfoBar || urlIsInvalid) {
+            mMustShowInfoBar = true;
+            return;
+        }
+
+        // Create and show the InfoBar.
+        Resources resources = activity.getResources();
+        String message = resources.getString(R.string.update_available_infobar);
+        String button = resources.getString(R.string.update_available_infobar_button);
+        OmahaUpdateInfobar updateBar =
+                new OmahaUpdateInfobar(activity, message, button, mUpdateURL);
+        currentTab.getInfoBarContainer().addInfoBar(updateBar);
+        mMustShowInfoBar = false;
+    }
+}