[Android] Enable WebAPK to have multiple intent filters

chrome/android/webapk/shell_apk/src/org/chromium/webapk/shell_apk/MainActivity.java

Index: chrome/android/webapk/shell_apk/src/org/chromium/webapk/shell_apk/MainActivity.java
diff --git a/chrome/android/webapk/shell_apk/src/org/chromium/webapk/shell_apk/MainActivity.java b/chrome/android/webapk/shell_apk/src/org/chromium/webapk/shell_apk/MainActivity.java
index 968e7bdb404b5e5be06e4b1b2045e29b747e809e..23eb86177532c91c09c56d0fb05c98eb103cb227 100644
--- a/chrome/android/webapk/shell_apk/src/org/chromium/webapk/shell_apk/MainActivity.java
+++ b/chrome/android/webapk/shell_apk/src/org/chromium/webapk/shell_apk/MainActivity.java
@@ -90,6 +90,20 @@ public class MainActivity extends Activity {
             return;
         }
 
+        // The WebAPK may have been launched as a result of an intent filter for a different
+        // scheme or top level domain. Rewrite the scheme and host name to the scope's
+        // scheme and host name.
+        String scopeUrl = metadata.getString(WebApkMetaDataKeys.SCOPE);
+        if (!TextUtils.isEmpty(scopeUrl)) {
+            Uri parsedStartUrl = Uri.parse(mStartUrl);
+            Uri parsedScope = Uri.parse(scopeUrl);
+            mStartUrl = parsedStartUrl.buildUpon()
+                                .scheme(parsedScope.getScheme())
+                                .encodedAuthority(parsedScope.getEncodedAuthority())
+                                .build()
+                                .toString();
+        }
+
         Log.v(TAG, "Url of the WebAPK: " + mStartUrl);
         String packageName = getPackageName();
         Log.v(TAG, "Package name of the WebAPK:" + packageName);