sync: Add GetAllSyncData to sync/api

chrome/browser/sync/glue/favicon_cache_unittest.cc

Index: chrome/browser/sync/glue/favicon_cache_unittest.cc
diff --git a/chrome/browser/sync/glue/favicon_cache_unittest.cc b/chrome/browser/sync/glue/favicon_cache_unittest.cc
index 20c95c241eae907b67623e65bbb977f4457f4f61..a460b0e1c0d7453443fdbf218a3f0989baf45168 100644
--- a/chrome/browser/sync/glue/favicon_cache_unittest.cc
+++ b/chrome/browser/sync/glue/favicon_cache_unittest.cc
@@ -41,6 +41,10 @@ class TestChangeProcessor : public syncer::SyncChangeProcessor {
       const tracked_objects::Location& from_here,
       const syncer::SyncChangeList& change_list) OVERRIDE;
 
+  virtual syncer::SyncDataList GetAllSyncData(syncer::ModelType type) const {
+    return syncer::SyncDataList();
+  }
+
   bool contains_guid(const std::string& guid) const {
     return change_map_.count(guid) != 0;
   }
@@ -109,6 +113,10 @@ class SyncChangeProcessorDelegate : public syncer::SyncChangeProcessor {
       const tracked_objects::Location& from_here,
       const syncer::SyncChangeList& change_list) OVERRIDE;
 
+  virtual syncer::SyncDataList GetAllSyncData(syncer::ModelType type) const {
+    return recipient_->GetAllSyncData(type);
+  }
+
  private:
   // The recipient of all sync changes.
   syncer::SyncChangeProcessor* recipient_;