Add search_terms_replacement_key field to TemplateURL.

chrome/common/pref_names.cc

Index: chrome/common/pref_names.cc
diff --git a/chrome/common/pref_names.cc b/chrome/common/pref_names.cc
index 1e3d7f8fd91159341974970c7915ddfb0fc78189..8391ed3fd919da1c3779585cd71893f2c4f22e41 100644
--- a/chrome/common/pref_names.cc
+++ b/chrome/common/pref_names.cc
@@ -426,6 +426,10 @@ const char kDefaultSearchProviderPrepopulateID[] =
 const char kDefaultSearchProviderAlternateURLs[] =
     "default_search_provider.alternate_urls";
 
+// Search term placement query parameter for the default search provider.
+const char kDefaultSearchProviderSearchTermsReplacementKey[] =
+    "default_search_provider.search_terms_replacement_key";
+
 // The dictionary key used when the default search providers are given
 // in the preferences file. Normally they are copied from the master
 // preferences file.