[Sync] Add interface and backend impl for typed URL syncable service

chrome/browser/history/history_backend.cc

Index: chrome/browser/history/history_backend.cc
diff --git a/chrome/browser/history/history_backend.cc b/chrome/browser/history/history_backend.cc
index 327896b44682c53e6ce3694ddcd1d2473361bc52..c34bc983abff140532fc4b24fa5de25e7bc7f2e2 100644
--- a/chrome/browser/history/history_backend.cc
+++ b/chrome/browser/history/history_backend.cc
@@ -33,6 +33,7 @@
 #include "chrome/browser/history/page_usage_data.h"
 #include "chrome/browser/history/select_favicon_frames.h"
 #include "chrome/browser/history/top_sites.h"
+#include "chrome/browser/history/typed_url_syncable_service.h"
 #include "chrome/browser/history/visit_filter.h"
 #include "chrome/common/chrome_constants.h"
 #include "chrome/common/chrome_notification_types.h"
@@ -296,6 +297,7 @@ void HistoryBackend::Init(const std::string& languages, bool force_fail) {
   if (!force_fail)
     InitImpl(languages);
   delegate_->DBLoaded(id_);
+  typed_url_syncable_service_.reset(new TypedUrlSyncableService(this));
 }
 
 void HistoryBackend::SetOnBackendDestroyTask(MessageLoop* message_loop,
@@ -889,6 +891,7 @@ std::pair<URLID, VisitID> HistoryBackend::AddPageVisit(
     URLVisitedDetails* details = new URLVisitedDetails;
     details->transition = transition;
     details->row = url_info;
+

[Andrew T Wilson (Slow), 2013/04/10 08:43:22]

nit: remove extraneous blank line

     // TODO(meelapshah) Disabled due to potential PageCycler regression.
     // Re-enable this.
     // GetMostRecentRedirectsTo(url, &details->redirects);
@@ -1174,6 +1177,10 @@ void HistoryBackend::QueryURL(scoped_refptr<QueryURLRequest> request,
   request->ForwardResult(request->handle(), success, row, visits);
 }
 
+TypedUrlSyncableService* HistoryBackend::GetTypedUrlSyncableService() const {
+  return typed_url_syncable_service_.get();
+}
+
 // Segment usage ---------------------------------------------------------------
 
 void HistoryBackend::DeleteOldSegmentData() {
@@ -2860,11 +2867,35 @@ void HistoryBackend::BroadcastNotifications(
     int type,
     HistoryDetails* details_deleted) {
   // |delegate_| may be NULL if |this| is in the process of closing (closed by
-  // HistoryService -> HistroyBackend::Closing().
-  if (delegate_.get())
+  // HistoryService -> HistoryBackend::Closing().
+  if (delegate_.get()) {
+    // Typed urls sync service is called here to handle deleted urls, including
+    // expirations from ExpireHistoryBackend, new, modified, and visited urls
+    if (typed_url_syncable_service_.get()) {
+      switch (type) {
+        case chrome::NOTIFICATION_HISTORY_URLS_DELETED: {
+          typed_url_syncable_service_->OnUrlsDeleted(
+              static_cast<history::URLsDeletedDetails*>(details_deleted));
+          break;
+        }
+        case chrome::NOTIFICATION_HISTORY_URLS_MODIFIED: {
+          typed_url_syncable_service_->OnUrlsModified(
+              static_cast<history::URLsModifiedDetails*>(details_deleted));
+          break;
+        }
+        case chrome::NOTIFICATION_HISTORY_URL_VISITED: {
+          typed_url_syncable_service_->OnUrlVisited(
+              static_cast<history::URLVisitedDetails*>(details_deleted));
+          break;
+        }
+        default:
+          break;
+      }
+    }
     delegate_->BroadcastNotifications(type, details_deleted);
-  else
+  } else {
     delete details_deleted;
+  }
 }
 
 // Deleting --------------------------------------------------------------------