Clean up unused param in RegistryOverrideManager

chrome/installer/gcapi/gcapi_last_run_test.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <limits>
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/guid.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/test/test_reg_util_win.h"
 #include "base/time/time.h"
 #include "base/win/registry.h"
 #include "chrome/installer/gcapi/gcapi.h"
 #include "chrome/installer/util/google_update_constants.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using base::Time;
 using base::TimeDelta;
 using base::win::RegKey;
 
 
 class GCAPILastRunTest : public ::testing::Test {
  protected:
   void SetUp() {
     // Override keys - this is undone during destruction.
-    std::wstring hkcu_override = base::StringPrintf(
-        L"hkcu_override\\%ls", base::ASCIIToWide(base::GenerateGUID()).c_str());
-    override_manager_.OverrideRegistry(HKEY_CURRENT_USER, hkcu_override);
+    override_manager_.OverrideRegistry(HKEY_CURRENT_USER);
 
     // Create the client state key in the right places.
     std::wstring reg_path(google_update::kRegPathClientState);
     reg_path += L"\\";
     reg_path += google_update::kChromeUpgradeCode;
     RegKey client_state(HKEY_CURRENT_USER,
                         reg_path.c_str(),
                         KEY_CREATE_SUB_KEY | KEY_WOW64_32KEY);
     ASSERT_TRUE(client_state.Valid());
 
@@ skipping 50 matching lines @@
   EXPECT_EQ(-1, days_since_last_run);
 }
 
 TEST_F(GCAPILastRunTest, OutOfRangeLastRun) {
   Time last_run = Time::NowFromSystemTime() - TimeDelta::FromDays(-42);
   EXPECT_TRUE(SetLastRunTime(last_run.ToInternalValue()));
 
   int days_since_last_run = GoogleChromeDaysSinceLastRun();
   EXPECT_EQ(-1, days_since_last_run);
 }