Add protobuffer and model type for syncing custom search engines. Includes all boilerplate helper...

chrome/browser/sync/protocol/proto_value_conversions.h

Index: chrome/browser/sync/protocol/proto_value_conversions.h
===================================================================
--- chrome/browser/sync/protocol/proto_value_conversions.h	(revision 89422)
+++ chrome/browser/sync/protocol/proto_value_conversions.h	(working copy)
@@ -23,6 +23,7 @@
 class PasswordSpecifics;
 class PasswordSpecificsData;
 class PreferenceSpecifics;
+class SearchEngineSpecifics;
 class SessionHeader;
 class SessionSpecifics;
 class SessionTab;
@@ -99,6 +100,9 @@
 DictionaryValue* PreferenceSpecificsToValue(
     const sync_pb::PreferenceSpecifics& password_specifics);
 
+DictionaryValue* SearchEngineSpecificsToValue(
+    const sync_pb::SearchEngineSpecifics& search_engine_specifics);
+
 DictionaryValue* SessionSpecificsToValue(
     const sync_pb::SessionSpecifics& session_specifics);