Add static method WebApkIconHasher::DownloadAndComputeMurmur2Hash

chrome/browser/android/webapk/webapk_icon_hasher.cc

Index: chrome/browser/android/webapk/webapk_icon_hasher.cc
diff --git a/chrome/browser/android/webapk/webapk_icon_hasher.cc b/chrome/browser/android/webapk/webapk_icon_hasher.cc
index 2a1a4133f1ef3ee1ce3ccbb7bea2b35a9fb421be..b7356225f0e50f2f24521883e0c1063d866cc0fb 100644
--- a/chrome/browser/android/webapk/webapk_icon_hasher.cc
+++ b/chrome/browser/android/webapk/webapk_icon_hasher.cc
@@ -44,6 +44,17 @@ WebApkIconHasher::WebApkIconHasher(
 
 WebApkIconHasher::~WebApkIconHasher() {}
 
+// static
+void WebApkIconHasher::DownloadAndComputeMurmur2Hash(
+    net::URLRequestContextGetter* request_context_getter,
+    const GURL& icon_url,
+    const Murmur2HashCallback& callback) {
+  // The icon hasher will delete itself when it is done.
+  WebApkIconHasher* webapk_icon_hasher =
+      new WebApkIconHasher(request_context_getter, icon_url, callback);
+  webapk_icon_hasher->DownloadAndComputeMurmur2Hash();
+}
+
 void WebApkIconHasher::DownloadAndComputeMurmur2Hash() {
   if (!icon_url_.is_valid()) {
     base::ThreadTaskRunnerHandle::Get()->PostTask(FROM_HERE,
@@ -80,6 +91,7 @@ void WebApkIconHasher::OnURLFetchComplete(const net::URLFetcher* source) {
   if (!source->GetStatus().is_success() ||
       source->GetResponseCode() != net::HTTP_OK) {
     callback_.Run("");
+    delete this;
     return;
   }
 
@@ -90,6 +102,7 @@ void WebApkIconHasher::OnURLFetchComplete(const net::URLFetcher* source) {
   std::string raw_image_data;
   source->GetResponseAsString(&raw_image_data);
   callback_.Run(ComputeMurmur2Hash(raw_image_data));
+  delete this;
 }
 
 void WebApkIconHasher::OnDownloadTimedOut() {
@@ -97,4 +110,5 @@ void WebApkIconHasher::OnDownloadTimedOut() {
 
   base::ThreadTaskRunnerHandle::Get()->PostTask(FROM_HERE,
                                                 base::Bind(callback_, ""));
+  delete this;
 }