Adds import/export of bookmarks to bookmarks.html file....

chrome/browser/bookmarks/bookmark_codec.h

Index: chrome/browser/bookmarks/bookmark_codec.h
===================================================================
--- chrome/browser/bookmarks/bookmark_codec.h	(revision 4885)
+++ chrome/browser/bookmarks/bookmark_codec.h	(working copy)
@@ -43,6 +43,22 @@
   // nodes.
   bool Decode(BookmarkModel* model, const Value& value);
 
+  // Names of the various keys written to the Value.
+  static const wchar_t* kRootsKey;
+  static const wchar_t* kRootFolderNameKey;
+  static const wchar_t* kOtherBookmarFolderNameKey;
+  static const wchar_t* kVersionKey;
+  static const wchar_t* kTypeKey;
+  static const wchar_t* kNameKey;
+  static const wchar_t* kDateAddedKey;
+  static const wchar_t* kURLKey;
+  static const wchar_t* kDateModifiedKey;
+  static const wchar_t* kChildrenKey;
+
+  // Possible values for kTypeKey.
+  static const wchar_t* kTypeURL;
+  static const wchar_t* kTypeFolder;
+
  private:
   // Encodes node and all its children into a Value object and returns it.
   // The caller takes ownership of the returned object.