[Sync] Initial support for encrypting any datatype (no UI hookup yet).

chrome/browser/sync/glue/session_change_processor.cc

Index: chrome/browser/sync/glue/session_change_processor.cc
diff --git a/chrome/browser/sync/glue/session_change_processor.cc b/chrome/browser/sync/glue/session_change_processor.cc
index 8823af0664cbaa1001a9413617826f0d287bf798..e15b770f1e104e50cd99f7c9260487bf4a770e29 100644
--- a/chrome/browser/sync/glue/session_change_processor.cc
+++ b/chrome/browser/sync/glue/session_change_processor.cc
@@ -10,8 +10,10 @@
 
 #include "base/logging.h"
 #include "base/scoped_vector.h"
+#include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/sync/engine/syncapi.h"
 #include "chrome/browser/sync/glue/session_model_associator.h"
+#include "chrome/browser/sync/profile_sync_service.h"
 #include "chrome/browser/tab_contents/navigation_controller.h"
 #include "chrome/browser/tab_contents/tab_contents.h"
 #include "chrome/common/notification_details.h"
@@ -183,6 +185,15 @@ void SessionChangeProcessor::ApplyChangesFromSyncModel(
 
     const sync_pb::SessionSpecifics& specifics(
         sync_node.GetSessionSpecifics());
+    if (specifics.session_tag() ==
+            session_model_associator_->GetCurrentMachineTag() &&
+        profile_->GetProfileSyncService()->cros_user() != "test user") {

[tim (not reviewing), 2011/02/11 06:52:31]

hmm... there's got to be a better way...

[Nicolas Zea, 2011/02/14 21:18:41]

Done.

+      // We should only ever receive a change to our own machine's session info
+      // if encryption was turned on. In that case, the data is still the same,
+      // so we can ignore.
+      LOG(WARNING) << "Dropping modification to local session.";
+      return;
+    }
     const int64 mtime = sync_node.GetModificationTime();
     // Model associator handles foreign session update and add the same.
     session_model_associator_->AssociateForeignSpecifics(specifics, mtime);