Open up method in InstallerDelegate

chrome/android/java/src/org/chromium/chrome/browser/banners/InstallerDelegate.java

Index: chrome/android/java/src/org/chromium/chrome/browser/banners/InstallerDelegate.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/banners/InstallerDelegate.java b/chrome/android/java/src/org/chromium/chrome/browser/banners/InstallerDelegate.java
index 2428ce5978f949f73804f6d6312316738b0be62a..da59c3747ffea45ac6725cc4459ea529c4e0f351 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/banners/InstallerDelegate.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/banners/InstallerDelegate.java
@@ -63,7 +63,7 @@ public class InstallerDelegate implements Runnable {
      * @param observer       Alerted when the package has been completely installed.
      * @param packageName    Name of the package for the app to monitor.
      */
-    InstallerDelegate(
+    public InstallerDelegate(
             Looper looper, PackageManager packageManager, Observer observer, String packageName) {
         mHandler = new Handler(looper);
         mPackageManager = packageManager;
@@ -100,17 +100,27 @@ public class InstallerDelegate implements Runnable {
 
     /**
      * Checks if the app has been installed on the system.
+     * @param packageManager PackageManager to use.
+     * @param packageName Name of the package to check.
      * @return True if the PackageManager reports that the app is installed, false otherwise.
      */
-    private boolean isInstalled() {
-        List<PackageInfo> packs = mPackageManager.getInstalledPackages(0);
+    public static boolean isInstalled(PackageManager packageManager, String packageName) {
+        List<PackageInfo> packs = packageManager.getInstalledPackages(0);
         for (int i = 0; i < packs.size(); i++) {
-            if (TextUtils.equals(packs.get(i).packageName, mPackageName)) return true;
+            if (TextUtils.equals(packs.get(i).packageName, packageName)) return true;
         }
         return false;
     }
 
     /**
+     * Checks if the app has been installed on the system.
+     * @return True if the PackageManager reports that the app is installed, false otherwise.
+     */
+    private boolean isInstalled() {
+        return isInstalled(mPackageManager, mPackageName);
+    }
+
+    /**
      * Prevent rescheduling the Runnable.
      */
     void cancel() {