Commment signed webapks working and verified.

chrome/android/java/src/org/chromium/chrome/browser/webapps/ChromeWebApkHost.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.chrome.browser.webapps;
 
 import android.content.Context;
 import android.os.StrictMode;
 import android.provider.Settings;
 
+import org.chromium.base.CommandLine;
 import org.chromium.base.ContextUtils;
 import org.chromium.base.Log;
 import org.chromium.base.annotations.CalledByNative;
 import org.chromium.base.library_loader.LibraryLoader;
 import org.chromium.chrome.browser.AppHooks;
 import org.chromium.chrome.browser.ChromeFeatureList;
+import org.chromium.chrome.browser.ChromeSwitches;
 import org.chromium.chrome.browser.GooglePlayInstallState;
 import org.chromium.chrome.browser.externalauth.ExternalAuthUtils;
 import org.chromium.chrome.browser.externalauth.UserRecoverableErrorHandler;
 import org.chromium.chrome.browser.preferences.ChromePreferenceManager;
 import org.chromium.webapk.lib.client.WebApkValidator;
 
 /**
  * Contains functionality needed for Chrome to host WebAPKs.
  */
 public class ChromeWebApkHost {
     private static final String TAG = "ChromeWebApkHost";
 
     /** Whether installing WebAPks from Google Play is possible. */
     private static Integer sGooglePlayInstallState;
 
     private static Boolean sEnabledForTesting;
 
     public static void init() {
-        WebApkValidator.initWithBrowserHostSignature(ChromeWebApkHostSignature.EXPECTED_SIGNATURE);
+        WebApkValidator.init(
+                CommandLine.getInstance().hasSwitch(ChromeSwitches.ENABLE_ANY_WEBAPK_PACKAGE_NAME),

[Yaron, 2017/04/10 14:17:33]

Hmm, does this actually work when loaded in chrome? I don't think native is
loaded at this point so you won't actually read the command line flag. Certainly
will need to be changed when we add the about:flag. I think you may actually
have to follow the caching-dance of |isEnabled| so that you can read it early
enough and not depend on native being loaded. If you want to do all this as a
follow-up that's fine with me but I'd be surprised if this works in chrome.

[ScottK, 2017/04/13 12:04:00]

Done.

+                ChromeWebApkHostSignature.EXPECTED_SIGNATURE, ChromeWebApkHostSignature.PUBLIC_KEY);
     }
 
     public static void initForTesting(boolean enabled) {
         sEnabledForTesting = enabled;
     }
 
     public static boolean isEnabled() {
         if (sEnabledForTesting != null) return sEnabledForTesting;
 
         return isEnabledInPrefs();
@@ skipping 101 matching lines @@
                            Settings.Secure.INSTALL_NON_MARKET_APPS)
                     == 1;
         } catch (Settings.SettingNotFoundException e) {
             return false;
         }
     }
 
     private static native boolean nativeCanLaunchRendererInWebApkProcess();
     private static native boolean nativeCanInstallFromUnknownSources();
 }