Pass icon and icon murmur2 hash to WebApkInstaller when updating WebAPKs.

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 2a2a58daae1ee83c54011df1f3e0768c302b58c4..0231684ca8845d6a97fb13a4a08752c5073b55ca 100644
--- a/chrome/browser/android/webapk/webapk_installer_unittest.cc
+++ b/chrome/browser/android/webapk/webapk_installer_unittest.cc
@@ -100,15 +100,17 @@ class WebApkInstallerRunner {
   }
 
   void RunUpdateWebApk() {
-    const int webapk_version = 1;
+    const std::string kIconMurmur2Hash = "0";
+    const int kWebApkVersion = 1;
 
     WebApkInstaller* installer = CreateWebApkInstaller();
 
     installer->UpdateAsyncWithURLRequestContextGetter(
         url_request_context_getter_.get(),
         base::Bind(&WebApkInstallerRunner::OnCompleted, base::Unretained(this)),
+        kIconMurmur2Hash,
         kDownloadedWebApkPackageName,
-        webapk_version);
+        kWebApkVersion);
 
     Run();
   }