[Sync] - Upload the callstacks for errors so that the line number of error is in callstack.

chrome/browser/sync/glue/bookmark_model_associator.h

Index: chrome/browser/sync/glue/bookmark_model_associator.h
diff --git a/chrome/browser/sync/glue/bookmark_model_associator.h b/chrome/browser/sync/glue/bookmark_model_associator.h
index f3b75bb72989588e18446adcb761b9f1dba89ec3..d2828c7af313db064b53a4e389cca3a7352a4e4e 100644
--- a/chrome/browser/sync/glue/bookmark_model_associator.h
+++ b/chrome/browser/sync/glue/bookmark_model_associator.h
@@ -58,9 +58,9 @@ class BookmarkModelAssociator
   // node.  After successful completion, the models should be identical and
   // corresponding. Returns true on success.  On failure of this step, we
   // should abort the sync operation and report an error to the user.
-  virtual bool AssociateModels(SyncError* error) OVERRIDE;
+  virtual SyncError AssociateModels() OVERRIDE;
 
-  virtual bool DisassociateModels(SyncError* error) OVERRIDE;
+  virtual SyncError DisassociateModels() OVERRIDE;
 
   // The has_nodes out param is true if the sync model has nodes other
   // than the permanent tagged nodes.
@@ -117,15 +117,16 @@ class BookmarkModelAssociator
 
   // Matches up the bookmark model and the sync model to build model
   // associations.
-  bool BuildAssociations(SyncError* error);
+  SyncError BuildAssociations();
 
   // Associate a top-level node of the bookmark model with a permanent node in
   // the sync domain.  Such permanent nodes are identified by a tag that is
   // well known to the server and the client, and is unique within a particular
   // user's share.  For example, "other_bookmarks" is the tag for the Other
   // Bookmarks folder.  The sync nodes are server-created.
-  bool AssociateTaggedPermanentNode(const BookmarkNode* permanent_node,
-                                    const std::string& tag) WARN_UNUSED_RESULT;
+  SyncError AssociateTaggedPermanentNode(
+      const BookmarkNode* permanent_node,
+      const std::string& tag) WARN_UNUSED_RESULT;
 
   // Compare the properties of a pair of nodes from either domain.
   bool NodesMatch(const BookmarkNode* bookmark,