Commment signed webapks working and verified.

chrome/android/java/src/org/chromium/chrome/browser/webapps/ChromeWebApkHost.java

Index: chrome/android/java/src/org/chromium/chrome/browser/webapps/ChromeWebApkHost.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/webapps/ChromeWebApkHost.java b/chrome/android/java/src/org/chromium/chrome/browser/webapps/ChromeWebApkHost.java
index 3ca4a81dc52613c0a44094481c4d388412375046..7e809d1e75de5e83f2b5e53bd7c7e65ddf85eed7 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/webapps/ChromeWebApkHost.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/webapps/ChromeWebApkHost.java
@@ -8,12 +8,14 @@ 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;
@@ -32,7 +34,9 @@ public class ChromeWebApkHost {
     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) {