Show AlertDialog when WebAPKs are enabled in chrome://flags but Unknown sources is disabled

chrome/android/java/src/org/chromium/chrome/browser/ChromeTabbedActivity.java

 // Copyright 2015 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;
 
 import android.annotation.TargetApi;
 import android.app.Activity;
 import android.app.ActivityManager;
 import android.content.Context;
@@ skipping 81 matching lines @@
 import org.chromium.chrome.browser.tabmodel.TabModelObserver;
 import org.chromium.chrome.browser.tabmodel.TabModelSelector;
 import org.chromium.chrome.browser.tabmodel.TabModelSelectorImpl;
 import org.chromium.chrome.browser.tabmodel.TabModelSelectorTabObserver;
 import org.chromium.chrome.browser.tabmodel.TabModelUtils;
 import org.chromium.chrome.browser.tabmodel.TabWindowManager;
 import org.chromium.chrome.browser.toolbar.ToolbarControlContainer;
 import org.chromium.chrome.browser.util.FeatureUtilities;
 import org.chromium.chrome.browser.util.IntentUtils;
 import org.chromium.chrome.browser.vr_shell.VrShellDelegate;
+import org.chromium.chrome.browser.webapps.ChromeWebApkHost;
 import org.chromium.chrome.browser.widget.emptybackground.EmptyBackgroundViewWrapper;
 import org.chromium.chrome.browser.widget.findinpage.FindToolbarManager;
 import org.chromium.content.browser.ContentVideoView;
 import org.chromium.content.browser.ContentViewCore;
 import org.chromium.content.browser.crypto.CipherFactory;
 import org.chromium.content.common.ContentSwitches;
 import org.chromium.content_public.browser.LoadUrlParams;
 import org.chromium.ui.base.DeviceFormFactor;
 import org.chromium.ui.base.PageTransition;
 import org.chromium.ui.base.WindowAndroid;
@@ skipping 263 matching lines @@
                 // first oppurtunity, and we don't want to show such content back to back.
                 if (preferenceManager.getPromosSkippedOnFirstStart()) {
                     // Data reduction promo should be temporarily suppressed if the sign in promo is
                     // shown to avoid nagging users too much.
                     if (!SigninPromoUtil.launchSigninPromoIfNeeded(this)) {
                         DataReductionPromoScreen.launchDataReductionPromo(this);
                     }
                 } else {
                     preferenceManager.setPromosSkippedOnFirstStart(true);
                 }
+
+                // Notify users experimenting with WebAPKs if they need to do extra steps to enable
+                // WebAPKs.
+                if (ChromeVersionInfo.isCanaryBuild() || ChromeVersionInfo.isDevBuild()) {

[gone, 2016/11/04 22:07:43]

Move the channel check into #launchWebApkRequirementsDialogIfNeeded() with all
the other checks you're doing.

+                    ChromeWebApkHost.launchWebApkRequirementsDialogIfNeeded(this);
+                }
             }
 
             initializeUI();
 
             // The dataset has already been created, we need to initialize our state.
             mTabModelSelectorImpl.notifyChanged();
 
             getWindow().setFeatureInt(Window.FEATURE_INDETERMINATE_PROGRESS,
                     Window.PROGRESS_VISIBILITY_OFF);
 
@@ skipping 1299 matching lines @@
      */
     public static void onMultiInstanceModeStarted() {
         // When a second instance is created, the merged instance task id should be cleared.
         setMergedInstanceTaskId(0);
     }
 
     private static void setMergedInstanceTaskId(int mergedInstanceTaskId) {
         sMergedInstanceTaskId = mergedInstanceTaskId;
     }
 }