Install downloaded WebAPK when "installation from unknown sources" is enabled

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 e640decb13ae08bf2719f91e39fd8dd6c65303b0..d7f294f343407d32e2fbc2165a16200bf7b85e70 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/ChromeApplication.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/ChromeApplication.java
@@ -92,7 +92,6 @@ 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.WebApkInstaller;
 import org.chromium.components.sync.signin.AccountManagerDelegate;
 import org.chromium.components.sync.signin.AccountManagerHelper;
 import org.chromium.components.sync.signin.SystemAccountManagerDelegate;
@@ -366,13 +365,6 @@ public class ChromeApplication extends ContentApplication {
     }
 
     /**
-     * Returns factory for installing WebAPKs.
-     */
-    public WebApkInstaller createWebApkInstaller() {
-        return null;
-    }
-
-    /**
      * Return a {@link AuthenticatorNavigationInterceptor} for the given {@link Tab}.
      * This can be null if there are no applicable interceptor to be built.
      */