Add a chrome://webapks page.

chrome/android/webapk/libs/client/src/org/chromium/webapk/lib/client/WebApkValidator.java

 // Copyright 2016 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.webapk.lib.client;
 
-import static org.chromium.webapk.lib.common.WebApkConstants.WEBAPK_PACKAGE_PREFIX;
-
 import android.content.Context;
 import android.content.Intent;
 import android.content.pm.PackageInfo;
 import android.content.pm.PackageManager;
 import android.content.pm.PackageManager.NameNotFoundException;
 import android.content.pm.ResolveInfo;
 import android.content.pm.Signature;
 import android.util.Log;
 
+import org.chromium.webapk.lib.common.WebApkConstants;

[Xi Han, 2017/01/16 16:56:19]

Is this change necessary?

[gonzalon, 2017/01/16 19:50:44]

I could finally figure out what was happening. The auto importer puts the static
import after all of the other imports, but when that happens I can't push the
code, because I get an error. I manually put the static import on top and now it
works, it was just a matter of setting up android studio to change the import
order to fit Google's guidelines.

+
 import java.util.Arrays;
 import java.util.List;
 
 /**
  * Checks whether a URL belongs to a WebAPK, and whether a WebAPK is signed by the WebAPK Minting
  * Server.
  */
 public class WebApkValidator {
 
     private static final String TAG = "WebApkValidator";
@@ skipping 34 matching lines @@
 
     /**
      * @param context The context to use to check whether WebAPK is valid.
      * @param infos The ResolveInfos to search.
      * @return Package name of the ResolveInfo which corresponds to a WebAPK. Null if none of the
      * ResolveInfos corresponds to a WebAPK.
      */
     public static String findWebApkPackage(Context context, List<ResolveInfo> infos) {
         for (ResolveInfo info : infos) {
             if (info.activityInfo != null
-                    && info.activityInfo.packageName.startsWith(WEBAPK_PACKAGE_PREFIX)
+                    && info.activityInfo.packageName.startsWith(
+                               WebApkConstants.WEBAPK_PACKAGE_PREFIX)
                     && isValidWebApk(context, info.activityInfo.packageName)) {
                 return info.activityInfo.packageName;
             }
         }
         return null;
     }
 
     /**
      * Returns whether the provided WebAPK is installed and passes signature checks.
      * @param context A context
      * @param webappPackageName The package name to check
      * @return true iff the WebAPK is installed and passes security checks
      */
-    private static boolean isValidWebApk(Context context, String webappPackageName) {
+    public static boolean isValidWebApk(Context context, String webappPackageName) {
         if (sExpectedSignature == null) {
             Log.wtf(TAG, "WebApk validation failure - expected signature not set."
                     + "missing call to WebApkValidator.initWithBrowserHostSignature");
         }
         // check signature
         PackageInfo packageInfo = null;
         try {
             packageInfo = context.getPackageManager().getPackageInfo(webappPackageName,
                     PackageManager.GET_SIGNATURES);
         } catch (NameNotFoundException e) {
@@ skipping 20 matching lines @@
      * with for the current host.
      * @param expectedSignature
      */
     public static void initWithBrowserHostSignature(byte[] expectedSignature) {
         if (sExpectedSignature != null) {
             return;
         }
         sExpectedSignature = Arrays.copyOf(expectedSignature, expectedSignature.length);
     }
 }