Makes WebAPK handle NOTIFICATION_PREFERENCES intents

chrome/android/webapk/shell_apk/src/org/chromium/webapk/shell_apk/WebApkUtils.java

Index: chrome/android/webapk/shell_apk/src/org/chromium/webapk/shell_apk/WebApkUtils.java
diff --git a/chrome/android/webapk/shell_apk/src/org/chromium/webapk/shell_apk/WebApkUtils.java b/chrome/android/webapk/shell_apk/src/org/chromium/webapk/shell_apk/WebApkUtils.java
index bf6a0d6eff11ec572645b205d9c6117eff913ebf..7a7a22b29aa84e2f4369892296978901029ed478 100644
--- a/chrome/android/webapk/shell_apk/src/org/chromium/webapk/shell_apk/WebApkUtils.java
+++ b/chrome/android/webapk/shell_apk/src/org/chromium/webapk/shell_apk/WebApkUtils.java
@@ -45,14 +45,10 @@ public class WebApkUtils {
      */
     public static String getHostBrowserPackageName(Context context) {
         if (sHostPackage != null) return sHostPackage;
+        Bundle metaData = getMetaDataBundle(context);
         String hostPackage = null;
-        try {
-            ApplicationInfo ai = context.getPackageManager().getApplicationInfo(
-                    context.getPackageName(), PackageManager.GET_META_DATA);
-            Bundle bundle = ai.metaData;
-            hostPackage = bundle.getString("runtimeHost");
-        } catch (NameNotFoundException e) {
-            e.printStackTrace();
+        if (metaData != null) {
+            hostPackage = metaData.getString("runtimeHost");
         }
         // Set {@link sHostPackage} to a non-null value so that the value is computed only once.
         sHostPackage = hostPackage != null ? hostPackage : "";
@@ -79,4 +75,21 @@ public class WebApkUtils {
         }
         return -1;
     }
+
+    /**
+     * Returns the meta data bundle for the application associated with
+     * passed in Context.
+     * @param context A context.
+     */
+    public static Bundle getMetaDataBundle(Context context) {
+        try {
+            PackageManager packageManager = context.getPackageManager();
+            ApplicationInfo appInfo = packageManager.getApplicationInfo(
+                    context.getPackageName(), PackageManager.GET_META_DATA);
+            return appInfo.metaData;
+        } catch (NameNotFoundException e) {
+            e.printStackTrace();
+        }
+        return null;
+    }
 }