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

components/variations/processed_study.cc

Index: components/variations/processed_study.cc
diff --git a/components/variations/processed_study.cc b/components/variations/processed_study.cc
index 9d0e4f14d512dbda40a6fda36a672a178e1257b0..bc534f63bec8be0e0460e4f3fb84a652db1f0377 100644
--- a/components/variations/processed_study.cc
+++ b/components/variations/processed_study.cc
@@ -91,6 +91,17 @@ bool ProcessedStudy::Init(const Study* study, bool is_expired) {
   return true;
 }
 
+int ProcessedStudy::GetExperimentIndexByName(
+    const std::string& name) const {
+  for (int i = 0; i < study_->experiment_size(); ++i) {
+    if (study_->experiment(i).name() == name) {

[Alexei Svitkine (slow), 2014/07/03 17:54:40]

Nit: No need for {}'s.

[jwd, 2014/07/07 15:52:20]

Done.

+      return i;
+    }
+  }
+
+  return -1;
+}
+
 // static
 bool ProcessedStudy::ValidateAndAppendStudy(
     const Study* study,