Extensions: Consolidate extension id hashing / searching.

chrome/browser/sync/glue/extension_backed_data_type_controller.cc

Index: chrome/browser/sync/glue/extension_backed_data_type_controller.cc
diff --git a/chrome/browser/sync/glue/extension_backed_data_type_controller.cc b/chrome/browser/sync/glue/extension_backed_data_type_controller.cc
index 7de4d7e732c1de49a12507d536253c1249c14164..8a117c4908d2082746979093cf55d0636af2d5f9 100644
--- a/chrome/browser/sync/glue/extension_backed_data_type_controller.cc
+++ b/chrome/browser/sync/glue/extension_backed_data_type_controller.cc
@@ -4,7 +4,6 @@
 
 #include "chrome/browser/sync/glue/extension_backed_data_type_controller.h"
 
-#include "base/sha1.h"
 #include "base/strings/string_number_conversions.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/sync/glue/chrome_report_unrecoverable_error.h"
@@ -18,17 +17,6 @@ using content::BrowserThread;
 
 namespace browser_sync {
 
-namespace {
-
-// Helper method to generate a hash from an extension id.
-std::string IdToHash(const std::string extension_id) {
-  std::string hash = base::SHA1HashString(extension_id);
-  hash = base::HexEncode(hash.c_str(), hash.length());
-  return hash;
-}
-
-}  // namespace
-
 ExtensionBackedDataTypeController::ExtensionBackedDataTypeController(
     syncer::ModelType type,
     const std::string& extension_hash,
@@ -108,7 +96,7 @@ bool ExtensionBackedDataTypeController::IsSyncingExtensionEnabled() const {
 
 bool ExtensionBackedDataTypeController::DoesExtensionMatch(
     const extensions::Extension& extension) const {
-  return IdToHash(extension.id()) == extension_hash_;
+  return extension.HashedIdInHex() == extension_hash_;
 }
 
 bool ExtensionBackedDataTypeController::StartModels() {