[WebAPKs] Do not request WebAPK update when Web Manifest scope did not change

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

Index: chrome/android/java/src/org/chromium/chrome/browser/webapps/ManifestUpgradeDetector.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/webapps/ManifestUpgradeDetector.java b/chrome/android/java/src/org/chromium/chrome/browser/webapps/ManifestUpgradeDetector.java
index bc15be819631876d8f7cf869701ad140b1c3526b..93168912c8d592c2841f162dcc94ec2293c218b2 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/webapps/ManifestUpgradeDetector.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/webapps/ManifestUpgradeDetector.java
@@ -13,6 +13,7 @@ import android.text.TextUtils;
 
 import org.chromium.base.ContextUtils;
 import org.chromium.base.Log;
+import org.chromium.chrome.browser.ShortcutHelper;
 import org.chromium.chrome.browser.tab.Tab;
 
 /**
@@ -153,6 +154,10 @@ public class ManifestUpgradeDetector implements ManifestUpgradeDetectorFetcher.C
         mFetcher.destroy();
         mFetcher = null;
 
+        if (TextUtils.isEmpty(scopeUrl)) {
+            scopeUrl = ShortcutHelper.getScopeFromUrl(startUrl);
+        }
+
         FetchedManifestData fetchedData = new FetchedManifestData();
         fetchedData.startUrl = startUrl;
         fetchedData.scopeUrl = scopeUrl;