Upstream: Create WebAPK when user selects "Add to Home screen"

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

Index: chrome/android/java/src/org/chromium/chrome/browser/ChromeApplication.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/ChromeApplication.java b/chrome/android/java/src/org/chromium/chrome/browser/ChromeApplication.java
index 0253c602d3d39023af46e90b9d072dca47716df2..447b024050d352790bc665d6d0e208b4f83fc792 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/ChromeApplication.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/ChromeApplication.java
@@ -89,6 +89,7 @@ import org.chromium.chrome.browser.tabmodel.document.DocumentTabModelSelector;
 import org.chromium.chrome.browser.tabmodel.document.StorageDelegate;
 import org.chromium.chrome.browser.tabmodel.document.TabDelegate;
 import org.chromium.chrome.browser.util.FeatureUtilities;
+import org.chromium.chrome.browser.webapps.WebApkBuilder;
 import org.chromium.content.app.ContentApplication;
 import org.chromium.content.browser.ChildProcessCreationParams;
 import org.chromium.content.browser.ChildProcessLauncher;
@@ -361,6 +362,13 @@ public class ChromeApplication extends ContentApplication {
     }
 
     /**
+     * Returns factory for building WebAPKs.
+     */
+    public WebApkBuilder createWebApkBuilder() {
+        return null;
+    }
+
+    /**
      * Return a {@link AuthenticatorNavigationInterceptor} for the given {@link Tab}.
      * This can be null if there are no applicable interceptor to be built.
      */