base/win: small improvement to RegKey API.

chrome/installer/util/install_util_unittest.cc

 // Copyright (c) 2011 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 <string>
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/test/test_reg_util_win.h"
 #include "base/win/registry.h"
@@ skipping 275 matching lines @@
       MockRegistryValuePredicate pred;
 
       EXPECT_CALL(pred, Evaluate(StrEq(L"foosball!"))).WillOnce(Return(false));
       ASSERT_EQ(ERROR_SUCCESS,
                 RegKey(root, key_path.c_str(),
                        KEY_SET_VALUE).WriteValue(value_name, L"foosball!"));
       EXPECT_TRUE(InstallUtil::DeleteRegistryValueIf(
           root, key_path.c_str(), value_name, pred));
       EXPECT_TRUE(RegKey(root, key_path.c_str(), KEY_QUERY_VALUE).Valid());
       EXPECT_TRUE(RegKey(root, key_path.c_str(),
-                         KEY_QUERY_VALUE).ValueExists(value_name));
+                         KEY_QUERY_VALUE).HasValue(value_name));
     }
 
     // Value exists, and matches: delete.
     {
       MockRegistryValuePredicate pred;
 
       EXPECT_CALL(pred, Evaluate(StrEq(value))).WillOnce(Return(true));
       ASSERT_EQ(ERROR_SUCCESS,
                 RegKey(root, key_path.c_str(),
                        KEY_SET_VALUE).WriteValue(value_name, value));
       EXPECT_TRUE(InstallUtil::DeleteRegistryValueIf(
           root, key_path.c_str(), value_name, pred));
       EXPECT_TRUE(RegKey(root, key_path.c_str(), KEY_QUERY_VALUE).Valid());
       EXPECT_FALSE(RegKey(root, key_path.c_str(),
-                          KEY_QUERY_VALUE).ValueExists(value_name));
+                          KEY_QUERY_VALUE).HasValue(value_name));
     }
   }
 
   {
     RegistryOverrideManager override_manager;
     override_manager.OverrideRegistry(root, L"root_key");
     // Default value matches: delete.
     {
       MockRegistryValuePredicate pred;
 
       EXPECT_CALL(pred, Evaluate(StrEq(value))).WillOnce(Return(true));
       ASSERT_EQ(ERROR_SUCCESS,
                 RegKey(root, key_path.c_str(),
                        KEY_SET_VALUE).WriteValue(L"", value));
       EXPECT_TRUE(InstallUtil::DeleteRegistryValueIf(
           root, key_path.c_str(), L"", pred));
       EXPECT_TRUE(RegKey(root, key_path.c_str(), KEY_QUERY_VALUE).Valid());
       EXPECT_FALSE(RegKey(root, key_path.c_str(),
-                          KEY_QUERY_VALUE).ValueExists(L""));
+                          KEY_QUERY_VALUE).HasValue(L""));
     }
   }
 }
 
 TEST_F(InstallUtilTest, ValueEquals) {
   InstallUtil::ValueEquals pred(L"howdy");
 
   EXPECT_FALSE(pred.Evaluate(L""));
   EXPECT_FALSE(pred.Evaluate(L"Howdy"));
   EXPECT_FALSE(pred.Evaluate(L"howdy!"));
   EXPECT_FALSE(pred.Evaluate(L"!howdy"));
   EXPECT_TRUE(pred.Evaluate(L"howdy"));
 }