Validate hash_sha256 checksum on .crx update.

chrome/browser/extensions/test_extension_service.cc

Index: chrome/browser/extensions/test_extension_service.cc
diff --git a/chrome/browser/extensions/test_extension_service.cc b/chrome/browser/extensions/test_extension_service.cc
index c5ae36a62cef0c5d814d1008b4c87459f0180a65..ef68e5ec5c1e2e41dcb7e597edb0cc3185c100fa 100644
--- a/chrome/browser/extensions/test_extension_service.cc
+++ b/chrome/browser/extensions/test_extension_service.cc
@@ -25,6 +25,16 @@ bool TestExtensionService::UpdateExtension(
   return false;
 }
 
+bool TestExtensionService::CheckAndUpdateExtension(
+    const std::string& id,
+    const base::FilePath& path,
+    const std::string& hash,
+    bool file_ownership_passed,
+    extensions::CrxInstaller** out_crx_installer) {
+  ADD_FAILURE();
+  return false;
+}
+
 const Extension* TestExtensionService::GetExtensionById(
     const std::string& id, bool include_disabled) const {
   ADD_FAILURE();