Reland after revert - Adds parsing for the app_id field from an

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 ff5f24ada88ebdd088b6a7e3ae30bdf5ea1ebf60..b6a79f1ea9d740ad1c2e9a412c048cdaef0e3298 100644
--- a/chrome/browser/chromeos/gdata/gdata_parser.h
+++ b/chrome/browser/chromeos/gdata/gdata_parser.h
@@ -62,8 +62,10 @@ class Link {
     EMBED,
     PRODUCT,
     ICON,
+    OPEN_WITH,
   };
   Link();
+  ~Link();
 
   // Registers the mapping between JSON field names and the members in
   // this class.
@@ -81,19 +83,30 @@ class Link {
   // Title of the link.
   const string16& title() const { return title_; }
 
+  // For OPEN_WITH links, this contains the application ID. For all other link
+  // types, it is the empty string.
+  const std::string& app_id() const { return app_id_; }
+
   // Link MIME type.
   const std::string& mime_type() const { return mime_type_; }
 
  private:
   friend class DocumentEntry;
-  // Converts value of link.rel into LinkType. Outputs to |result| and
-  // returns true when |rel| has a valid value. Otherwise does nothing
-  // and returns false.
-  static bool GetLinkType(const base::StringPiece& rel, LinkType* result);
+  // Converts value of link.rel into LinkType. Outputs to |type| and returns
+  // true when |rel| has a valid value. Otherwise does nothing and returns
+  // false.
+  static bool GetLinkType(const base::StringPiece& rel, LinkType* type);
+
+  // Converts value of link.rel to application ID, if there is one embedded in
+  // the link.rel field. Outputs to |app_id| and returns true when |rel| has a
+  // valid value. Otherwise does nothing and returns false.
+  static bool GetAppID(const base::StringPiece& rel, std::string* app_id);
+
 
   LinkType type_;
   GURL href_;
   string16 title_;
+  std::string app_id_;
   std::string mime_type_;
 
   DISALLOW_COPY_AND_ASSIGN(Link);