Use SNAPSHOT sync mode for LocalSync

chrome/browser/sync_file_system/local/local_file_sync_service.cc

Index: chrome/browser/sync_file_system/local/local_file_sync_service.cc
diff --git a/chrome/browser/sync_file_system/local/local_file_sync_service.cc b/chrome/browser/sync_file_system/local/local_file_sync_service.cc
index 33fbb34757feabae27d3aacca15f3c41bc094940..8a987b85617794a3ffc417a787a14b7c8edd173d 100644
--- a/chrome/browser/sync_file_system/local/local_file_sync_service.cc
+++ b/chrome/browser/sync_file_system/local/local_file_sync_service.cc
@@ -22,6 +22,7 @@
 #include "url/gurl.h"
 #include "webkit/browser/fileapi/file_system_context.h"
 #include "webkit/browser/fileapi/file_system_url.h"
+#include "webkit/common/blob/scoped_file.h"
 
 using content::BrowserThread;
 using fileapi::FileSystemURL;
@@ -33,7 +34,8 @@ namespace {
 void PrepareForProcessRemoteChangeCallbackAdapter(
     const RemoteChangeProcessor::PrepareChangeCallback& callback,
     SyncStatusCode status,
-    const LocalFileSyncInfo& sync_file_info) {
+    const LocalFileSyncInfo& sync_file_info,
+    scoped_ptr<webkit_blob::ScopedFile> snapshot) {
   callback.Run(status, sync_file_info.metadata, sync_file_info.changes);
 }
 
@@ -97,6 +99,7 @@ void LocalFileSyncService::OriginChangeMap::SetOriginEnabled(
 LocalFileSyncService::LocalFileSyncService(Profile* profile)
     : profile_(profile),
       sync_context_(new LocalFileSyncContext(
+          profile_->GetPath(),
           BrowserThread::GetMessageLoopProxyForThread(BrowserThread::UI).get(),
           BrowserThread::GetMessageLoopProxyForThread(BrowserThread::IO)
               .get())),
@@ -362,7 +365,8 @@ void LocalFileSyncService::RunLocalSyncCallback(
 
 void LocalFileSyncService::DidGetFileForLocalSync(
     SyncStatusCode status,
-    const LocalFileSyncInfo& sync_file_info) {
+    const LocalFileSyncInfo& sync_file_info,
+    scoped_ptr<webkit_blob::ScopedFile> snapshot) {
   DCHECK(!local_sync_callback_.is_null());
   if (status != SYNC_STATUS_OK) {
     RunLocalSyncCallback(status, sync_file_info.url);
@@ -386,11 +390,12 @@ void LocalFileSyncService::DidGetFileForLocalSync(
       sync_file_info.metadata,
       sync_file_info.url,
       base::Bind(&LocalFileSyncService::ProcessNextChangeForURL,
-                 AsWeakPtr(), sync_file_info,
+                 AsWeakPtr(), base::Passed(&snapshot), sync_file_info,
                  next_change, sync_file_info.changes.PopAndGetNewList()));
 }
 
 void LocalFileSyncService::ProcessNextChangeForURL(
+    scoped_ptr<webkit_blob::ScopedFile> snapshot,
     const LocalFileSyncInfo& sync_file_info,
     const FileChange& processed_change,
     const FileChangeList& changes,
@@ -407,7 +412,8 @@ void LocalFileSyncService::ProcessNextChangeForURL(
         sync_file_info.metadata,
         sync_file_info.url,
         base::Bind(&LocalFileSyncService::ProcessNextChangeForURL,
-                   AsWeakPtr(), sync_file_info, processed_change, changes));
+                   AsWeakPtr(), base::Passed(&snapshot),
+                   sync_file_info, processed_change, changes));
     return;
   }
 
@@ -434,7 +440,7 @@ void LocalFileSyncService::ProcessNextChangeForURL(
       sync_file_info.metadata,
       url,
       base::Bind(&LocalFileSyncService::ProcessNextChangeForURL,
-                 AsWeakPtr(), sync_file_info,
+                 AsWeakPtr(), base::Passed(&snapshot), sync_file_info,
                  next_change, changes.PopAndGetNewList()));
 }