Fix extension content verification out-of-band hash fetching

chrome/common/extensions/extension_constants.h

Index: chrome/common/extensions/extension_constants.h
diff --git a/chrome/common/extensions/extension_constants.h b/chrome/common/extensions/extension_constants.h
index ff4aaa59ea33b3aef786baca54c9208dca3bb0c1..7889c1ce7188bdc6a04f4386abecc8f253a8c6ca 100644
--- a/chrome/common/extensions/extension_constants.h
+++ b/chrome/common/extensions/extension_constants.h
@@ -246,10 +246,6 @@ extern const char kAppStateReadyToRun[];
 // The path part of the file system url used for media file systems.
 extern const char kMediaFileSystemPathPart[];
 
-// The key used for signing some pieces of data from the webstore.
-extern const uint8_t kWebstoreSignaturesPublicKey[];
-extern const int kWebstoreSignaturesPublicKeySize;
-
 #if defined(OS_CHROMEOS)
 // Returns true if |extension_id| is one of the IME extensions that will create
 // IME menu.