Use Drive v2 API: enable behind --enable-drive-api flag

chrome/browser/chromeos/gdata/gdata_parser.h

Index: chrome/browser/chromeos/gdata/gdata_parser.h
diff --git a/chrome/browser/chromeos/gdata/gdata_parser.h b/chrome/browser/chromeos/gdata/gdata_parser.h
index 90d4599c5b38e5da61c064146a09a1cd45e44862..4a599784a42b32ca960a929f1bce4fc1ee92cee1 100644
--- a/chrome/browser/chromeos/gdata/gdata_parser.h
+++ b/chrome/browser/chromeos/gdata/gdata_parser.h
@@ -658,7 +658,8 @@ class AccountMetadataFeed {
   // this method does some post-process for some fields.  See
   // FillRemainingFields comment and implementation in DocumentEntry
   // class for the details.
-  static scoped_ptr<AccountMetadataFeed> CreateFrom(const base::Value& value);
+  static scoped_ptr<AccountMetadataFeed> CreateFrom(const base::Value& value,
+                                                    bool use_drive_api);
 
   int64 quota_bytes_total() const {
     return quota_bytes_total_;
@@ -676,27 +677,18 @@ class AccountMetadataFeed {
     return installed_apps_;
   }
 
-  // Registers the mapping between JSON field names and the members in
-  // this class.
-  static void RegisterJSONConverter(
-      base::JSONValueConverter<AccountMetadataFeed>* converter);
-
- private:
+ protected:
   AccountMetadataFeed();
 
-  // Parses and initializes data members from content of |value|.
-  // Return false if parsing fails.
-  bool Parse(const base::Value& value);
-
   int64 quota_bytes_total_;
   int64 quota_bytes_used_;
   int largest_changestamp_;
   ScopedVector<InstalledApp> installed_apps_;
 
+ private:
   DISALLOW_COPY_AND_ASSIGN(AccountMetadataFeed);
 };
 
-
 }  // namespace gdata
 
 #endif  // CHROME_BROWSER_CHROMEOS_GDATA_GDATA_PARSER_H_