Add static method WebApkIconHasher::DownloadAndComputeMurmur2Hash

chrome/browser/android/webapk/webapk_update_data_fetcher.cc

Index: chrome/browser/android/webapk/webapk_update_data_fetcher.cc
diff --git a/chrome/browser/android/webapk/webapk_update_data_fetcher.cc b/chrome/browser/android/webapk/webapk_update_data_fetcher.cc
index 2443cd0722bd8ef894a0ef5591ad6448bde8ae89..69f626329dbb8f4210c7c302615a1a4b29af0491 100644
--- a/chrome/browser/android/webapk/webapk_update_data_fetcher.cc
+++ b/chrome/browser/android/webapk/webapk_update_data_fetcher.cc
@@ -155,17 +155,14 @@ void WebApkUpdateDataFetcher::OnDidGetInstallableData(
   Profile* profile =
       Profile::FromBrowserContext(web_contents()->GetBrowserContext());
 
-  icon_hasher_.reset(new WebApkIconHasher(
+  WebApkIconHasher::DownloadAndComputeMurmur2Hash(
       profile->GetRequestContext(), data.primary_icon_url,
       base::Bind(&WebApkUpdateDataFetcher::OnGotIconMurmur2Hash,
-                 weak_ptr_factory_.GetWeakPtr())));
-  icon_hasher_->DownloadAndComputeMurmur2Hash();
+                 weak_ptr_factory_.GetWeakPtr()));
 }
 
 void WebApkUpdateDataFetcher::OnGotIconMurmur2Hash(
     const std::string& best_primary_icon_murmur2_hash) {
-  icon_hasher_.reset();
-
   if (best_primary_icon_murmur2_hash.empty()) {
     OnWebManifestNotWebApkCompatible();
     return;