Store default search provider data in dictionary pref.

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 cdf3cae27531426a01e66817fc1a77a4bb9b2757..acedca67833703a713ae7a512cc0a971b9e98cb9 100644
--- a/chrome/common/pref_names.cc
+++ b/chrome/common/pref_names.cc
@@ -345,6 +345,12 @@ const char kConfirmToQuitEnabled[] = "browser.confirm_to_quit";
 // 2 - block all cookies
 const char kCookieBehavior[] = "security.cookie_behavior";
 
+// A dictionary to hold all data related to the Default Search Engine.
+// Eventually, this should replace all the data stored in the
+// default_search_provider.* prefs below.
+const char kDefaultSearchProviderData[] =
+    "default_search_provider.template_url_data";
+
 // The GUID of the synced default search provider. Note that this acts like a
 // pointer to which synced search engine should be the default, rather than the
 // prefs below which describe the locally saved default search provider details