[Extensions] Consolidate ExtensionFunction::SendResponse()s

chrome/browser/extensions/chrome_extension_function.h

Index: chrome/browser/extensions/chrome_extension_function.h
diff --git a/chrome/browser/extensions/chrome_extension_function.h b/chrome/browser/extensions/chrome_extension_function.h
index dede716c8e93a05eb74046c07e1dd596cb86b5a8..a556085562dbf13e8e890d95ba37327bc9d5243f 100644
--- a/chrome/browser/extensions/chrome_extension_function.h
+++ b/chrome/browser/extensions/chrome_extension_function.h
@@ -58,6 +58,10 @@ class ChromeUIThreadExtensionFunction : public UIThreadExtensionFunction {
   // contents then defaults to the foremost one.
   content::WebContents* GetAssociatedWebContents() override;
 
+  // Responds with success/failure. |results_| or |error_| should be set
+  // accordingly.
+  void SendResponse(bool success);
+
  protected:
   ~ChromeUIThreadExtensionFunction() override;