Revert 207805 "Differential updates for components. We are addin..."

trunk/src/extensions/common/crx_file.h

Index: trunk/src/extensions/common/crx_file.h
===================================================================
--- trunk/src/extensions/common/crx_file.h	(revision 207822)
+++ trunk/src/extensions/common/crx_file.h	(working copy)
@@ -60,10 +60,6 @@
   // Returns the header structure for writing out to a CRX file.
   const Header& header() const { return header_; }
 
-  // Checks a valid |header| to determine whether or not the CRX represents a
-  // differential CRX.
-  static bool HeaderIsDelta(const Header& header);
-
  private:
   Header header_;