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

chrome/browser/metrics/variations/generated_resources_map_lookup.cc

+// Copyright 2014 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 <algorithm>
+
+namespace chrome_variations {
+
+int GetResourceIndex(uint32_t hash) {
+  const uint32_t* kEnd = kResourceHashes + kNumResources;
+  const uint32_t* element = std::lower_bound(kResourceHashes, kEnd, hash);
+
+  if (element == kEnd || *element != hash)
+    return -1;
+  return kResourceIndices[element - kResourceHashes];
+}
+
+}  // namespace chrome_variations