Add support for variations controlled overriding UI strings to the variations service.

chrome/browser/metrics/variations/generated_resources_map_lookup_unittest.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 "chrome/browser/metrics/variations/generated_resources_map.h"
+
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace chrome_variations {
+
+TEST(GeneratedResourcesMapLookupTest, LookupNotFound) {
+  EXPECT_EQ(-1, GetResourceIndex(0));
+  EXPECT_EQ(-1, GetResourceIndex(kResourceHashes[kNumResources - 1] + 1));
+
+  // Lookup a hash that shouldn't exist.
+  // 13257681U is 1 + the hash for IDS_ZOOM_NORMAL
+  EXPECT_EQ(-1, GetResourceIndex(13257681U));
+}
+
+TEST(GeneratedResourcesMapLookupTest, LookupFound) {
+  for (size_t i = 0; i < kNumResources; ++i)
+    EXPECT_EQ(kResourceIndices[i], GetResourceIndex(kResourceHashes[i]));
+}
+
+}  // namespace chrome_variations