Do not reinvent the wheel / use content APIs to find a frame by name.

content/browser/webui/web_ui_impl.h

Index: content/browser/webui/web_ui_impl.h
diff --git a/content/browser/webui/web_ui_impl.h b/content/browser/webui/web_ui_impl.h
index f0faba6ae0ebe00d4aa4c819bdb4a9b361403f29..9ce9917d9d9710a03366c4315c89bba35562ae6a 100644
--- a/content/browser/webui/web_ui_impl.h
+++ b/content/browser/webui/web_ui_impl.h
@@ -96,11 +96,6 @@ class CONTENT_EXPORT WebUIImpl : public WebUI,
   // frame of the specified name exists in the page.
   RenderFrameHost* TargetFrame();
 
-  // A helper function for TargetFrame; adds a frame to the specified set if its
-  // name matches |frame_name_|.
-  void AddToSetIfFrameNameMatches(std::set<RenderFrameHost*>* frame_set,
-                                  RenderFrameHost* host);
-
   // Called internally and by the owned MainFrameNavigationObserver.
   void DisallowJavascriptOnAllHandlers();