Simple cleanup to avoid needing to worry about having a reference to a deleted string.

chrome/browser/extensions/extension_service.cc

Index: chrome/browser/extensions/extension_service.cc
diff --git a/chrome/browser/extensions/extension_service.cc b/chrome/browser/extensions/extension_service.cc
index 2499bd4082c69a2e12e81de210a77d276acc9b2b..712e8630449d104d4a4f71f3abdb2d30ed811d05 100644
--- a/chrome/browser/extensions/extension_service.cc
+++ b/chrome/browser/extensions/extension_service.cc
@@ -627,16 +627,11 @@ void ExtensionService::ReloadExtension(const std::string& extension_id) {
 }
 
 bool ExtensionService::UninstallExtension(
-    const std::string& extension_id_unsafe,
+    std::string extension_id,
     bool external_uninstall,
     std::string* error) {
   CHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 
-  // Copy the extension identifier since the reference might have been
-  // obtained via Extension::id() and the extension may be deleted in
-  // this function.
-  std::string extension_id(extension_id_unsafe);
-
   scoped_refptr<const Extension> extension(GetInstalledExtension(extension_id));
 
   // Callers should not send us nonexistent extensions.