Apps/Extensions Sync refactoring -- delete most of the old glue, implement new sync API.

chrome/common/extensions/extension.h

Index: chrome/common/extensions/extension.h
diff --git a/chrome/common/extensions/extension.h b/chrome/common/extensions/extension.h
index d5801f53c0b270a6e61533bdc03f9dc5e695bb1c..835a360daa98af90f60d3e1e2edc9e1c5d78776b 100644
--- a/chrome/common/extensions/extension.h
+++ b/chrome/common/extensions/extension.h
@@ -105,6 +105,12 @@ class Extension : public base::RefCountedThreadSafe<Extension> {
     TYPE_PACKAGED_APP
   };
 
+  enum SyncType {
+    SYNC_TYPE_NONE = 0,
+    SYNC_TYPE_EXTENSION,
+    SYNC_TYPE_APP
+  };
+
   // An NPAPI plugin included in the extension.
   struct PluginInfo {
     FilePath path;  // Path to the plugin.
@@ -481,6 +487,9 @@ class Extension : public base::RefCountedThreadSafe<Extension> {
   // Returns true if this extension or app includes areas within |origin|.
   bool OverlapsWithOrigin(const GURL& origin) const;
 
+  // Returns the sync bucket to use for this extension.
+  SyncType GetSyncType() const;
+
   // Accessors:
 
   const FilePath& path() const { return path_; }