Remove finch flag for play installation.

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;
 
@@ skipping 40 matching lines @@
 
         // Updating a WebAPK without going through Google Play requires "installation from unknown
         // sources" to be enabled. It is confusing for a user to see a dialog asking them to enable
         // "installation from unknown sources" when they are in the middle of using the WebAPK (as
         // opposed to after requesting to add a WebAPK to the homescreen).
         return installingFromUnknownSourcesAllowed() || canUseGooglePlayToInstallWebApk();
     }
 
     /** Computes the GooglePlayInstallState. */
     private static int computeGooglePlayInstallState() {
-        if (!isGooglePlayInstallEnabledByChromeFeature()) {
-            return GooglePlayInstallState.DISABLED_BY_VARIATIONS;
-        }
-
         if (!ExternalAuthUtils.getInstance().canUseGooglePlayServices(
                     ContextUtils.getApplicationContext(),
                     new UserRecoverableErrorHandler.Silent())) {
             return GooglePlayInstallState.NO_PLAY_SERVICES;
         }
 
         GooglePlayWebApkInstallDelegate delegate =
                 AppHooks.get().getGooglePlayWebApkInstallDelegate();
         if (delegate == null) {
             return GooglePlayInstallState.DISABLED_OTHER;
         }
 
         return GooglePlayInstallState.SUPPORTED;
     }
 
     /**
      * Returns whether installing WebAPKs from Google Play is possible.
      * If {@link sCanUseGooglePlayInstall} hasn't been set yet, it returns false immediately and
      * calls the Google Play Install API to update {@link sCanUseGooglePlayInstall} asynchronously.
      */
     private static boolean canUseGooglePlayToInstallWebApk() {
         return getGooglePlayInstallState() == GooglePlayInstallState.SUPPORTED;
     }
 
     /**
-     * Returns whether Google Play install is enabled by Chrome. Does not check whether installing
-     * from Google Play is possible.
-     */
-    public static boolean isGooglePlayInstallEnabledByChromeFeature() {

[Xi Han, 2017/03/30 22:14:11]

You also need to update AppHooksImpl#getGooglePlayWebApkInstallDelegate() in
clank as a separate CL.

[Yaron, 2017/03/31 13:50:13]

Already did: https://chrome-internal-review.googlesource.com/#/c/341783/ :)

-        return isEnabled() && LibraryLoader.isInitialized()
-                && nativeCanUseGooglePlayToInstallWebApk();
-    }
-
-    /**
      * Returns whether installing WebAPKs is possible either from "unknown resources" or Google
      * Play.
      */
     @CalledByNative
     private static boolean canInstallWebApk() {
         return isEnabled()
                 && (canUseGooglePlayToInstallWebApk() || nativeCanInstallFromUnknownSources());
     }
 
     @CalledByNative
@@ skipping 48 matching lines @@
         Context applicationContext = ContextUtils.getApplicationContext();
         try {
             return Settings.Secure.getInt(applicationContext.getContentResolver(),
                            Settings.Secure.INSTALL_NON_MARKET_APPS)
                     == 1;
         } catch (Settings.SettingNotFoundException e) {
             return false;
         }
     }
 
-    private static native boolean nativeCanUseGooglePlayToInstallWebApk();
     private static native boolean nativeCanLaunchRendererInWebApkProcess();
     private static native boolean nativeCanInstallFromUnknownSources();
 }