[Extensions] Remove ChromeSyncExtensionFunction

chrome/browser/extensions/chrome_extension_function.cc

Index: chrome/browser/extensions/chrome_extension_function.cc
diff --git a/chrome/browser/extensions/chrome_extension_function.cc b/chrome/browser/extensions/chrome_extension_function.cc
index f0f0cfd8890999724827b521229449805ff4bf22..a9ceec612647eebad8503aded30973be34270fe4 100644
--- a/chrome/browser/extensions/chrome_extension_function.cc
+++ b/chrome/browser/extensions/chrome_extension_function.cc
@@ -95,22 +95,3 @@ bool ChromeAsyncExtensionFunction::ValidationFailure(
     ChromeAsyncExtensionFunction* function) {
   return false;
 }
-
-ChromeSyncExtensionFunction::ChromeSyncExtensionFunction() {
-}
-
-ChromeSyncExtensionFunction::~ChromeSyncExtensionFunction() {}
-
-ExtensionFunction::ResponseAction ChromeSyncExtensionFunction::Run() {
-  if (!RunSync()) {
-    DCHECK(!results_);
-    return RespondNow(Error(error_));
-  }
-  return RespondNow(ArgumentList(std::move(results_)));
-}
-
-// static
-bool ChromeSyncExtensionFunction::ValidationFailure(
-    ChromeSyncExtensionFunction* function) {
-  return false;
-}