Implement server-suggested update check backoff

chrome/browser/android/webapk/webapk_installer_unittest.cc

Index: chrome/browser/android/webapk/webapk_installer_unittest.cc
diff --git a/chrome/browser/android/webapk/webapk_installer_unittest.cc b/chrome/browser/android/webapk/webapk_installer_unittest.cc
index 556b13a5f1786f54eb0aee9de162f4fc82f3f8a4..e00364d1b84b2c306c875bb1e5e018305898460f 100644
--- a/chrome/browser/android/webapk/webapk_installer_unittest.cc
+++ b/chrome/browser/android/webapk/webapk_installer_unittest.cc
@@ -167,7 +167,8 @@ class WebApkInstallerRunner {
   bool success() { return success_; }
 
  private:
-  void OnCompleted(bool success, const std::string& webapk_package) {
+  void OnCompleted(bool success,
+                   const WebApkInstaller::FinishCallbackData& data) {
     success_ = success;
     on_completed_callback_.Run();
   }