base: Assert that RegKey::ValueCount() is updated according in RegistryTest.

BUG=None
TEST=out/Debug/base_unittests --gtest_filter=RegistryTest.ValueTest

Review URL: http://codereview.chromium.org/3132035

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@57289 0039d316-1c4b-4281-b951-d872f2087c98

base/registry_unittest.cc

@@ -51,6 +51,7 @@ TEST_F(RegistryTest, ValueTest) {
     EXPECT_TRUE(key.ReadValue(kName, &out_value));
     EXPECT_NE(out_value, L"");
     EXPECT_STREQ(out_value.c_str(), kValue);
+    EXPECT_EQ(1U, key.ValueCount());
     EXPECT_TRUE(key.DeleteValue(kName));
   }
 }