base/win: Add documentation to RegKey::Read/Write functions.

chrome/installer/util/delete_reg_key_work_item_unittest.cc

Index: chrome/installer/util/delete_reg_key_work_item_unittest.cc
diff --git a/chrome/installer/util/delete_reg_key_work_item_unittest.cc b/chrome/installer/util/delete_reg_key_work_item_unittest.cc
index 2127e3db59ce54b6d50bee56297c13a099785a3e..6cfa5cc44e15f7ce89d0f65440cfed5d38824a20 100644
--- a/chrome/installer/util/delete_reg_key_work_item_unittest.cc
+++ b/chrome/installer/util/delete_reg_key_work_item_unittest.cc
@@ -126,7 +126,7 @@ TEST_F(DeleteRegKeyWorkItemTest, DISABLED_TestUndeletableKey) {
   EXPECT_EQ(key_name, str_value);
   EXPECT_EQ(ERROR_SUCCESS, key.OpenKey(L"Subkey", KEY_READ | WRITE_DAC));
   dw_value = 0;
-  EXPECT_EQ(ERROR_SUCCESS, key.ReadValueDW(L"SomeValue", &dw_value));
+  EXPECT_EQ(ERROR_SUCCESS, key.ReadValue(L"SomeValue", &dw_value));
   EXPECT_EQ(1U, dw_value);
   // Give users all access to the subkey so it can be deleted.
   EXPECT_EQ(ERROR_SUCCESS,
@@ -134,6 +134,6 @@ TEST_F(DeleteRegKeyWorkItemTest, DISABLED_TestUndeletableKey) {
                         const_cast<SECURITY_DESCRIPTOR*>(
                             sec_desc.GetPSECURITY_DESCRIPTOR())));
   EXPECT_EQ(ERROR_SUCCESS, key.OpenKey(L"Subkey2", KEY_QUERY_VALUE));
-  EXPECT_EQ(ERROR_SUCCESS, key.ReadValueDW(L"", &dw_value));
+  EXPECT_EQ(ERROR_SUCCESS, key.ReadValue(L"", &dw_value));
   EXPECT_EQ(2U, dw_value);
 }