[Extensions] Clean up the handling of ExtensionHostMsg_Request

chrome/browser/guest_view/mime_handler_view/chrome_mime_handler_view_guest_delegate.cc

Index: chrome/browser/guest_view/mime_handler_view/chrome_mime_handler_view_guest_delegate.cc
diff --git a/chrome/browser/guest_view/mime_handler_view/chrome_mime_handler_view_guest_delegate.cc b/chrome/browser/guest_view/mime_handler_view/chrome_mime_handler_view_guest_delegate.cc
index 9a3d14038f248568dac8009e76dad38cb177ad30..ce477434c89dfb6c3b41f59440d7a4c684f83cda 100644
--- a/chrome/browser/guest_view/mime_handler_view/chrome_mime_handler_view_guest_delegate.cc
+++ b/chrome/browser/guest_view/mime_handler_view/chrome_mime_handler_view_guest_delegate.cc
@@ -4,52 +4,17 @@
 
 #include "chrome/browser/guest_view/mime_handler_view/chrome_mime_handler_view_guest_delegate.h"
 
-#include "chrome/browser/extensions/chrome_extension_web_contents_observer.h"
 #include "chrome/browser/renderer_context_menu/render_view_context_menu.h"
-#include "chrome/browser/ui/pdf/chrome_pdf_web_contents_helper_client.h"
-#include "components/pdf/browser/pdf_web_contents_helper.h"
 #include "components/renderer_context_menu/context_menu_delegate.h"
-#include "components/ui/zoom/page_zoom.h"
-#include "extensions/browser/guest_view/mime_handler_view/mime_handler_view_guest.h"
-
-#if defined(ENABLE_PRINTING)
-#if defined(ENABLE_PRINT_PREVIEW)
-#include "chrome/browser/printing/print_preview_message_handler.h"
-#include "chrome/browser/printing/print_view_manager.h"
-#else
-#include "chrome/browser/printing/print_view_manager_basic.h"
-#endif  // defined(ENABLE_PRINT_PREVIEW)
-#endif  // defined(ENABLE_PRINTING)
 
 namespace extensions {
 
-ChromeMimeHandlerViewGuestDelegate::ChromeMimeHandlerViewGuestDelegate(
-    MimeHandlerViewGuest* guest)
-    : MimeHandlerViewGuestDelegate(guest), guest_(guest) {
+ChromeMimeHandlerViewGuestDelegate::ChromeMimeHandlerViewGuestDelegate() {
 }
 
 ChromeMimeHandlerViewGuestDelegate::~ChromeMimeHandlerViewGuestDelegate() {
 }
 
-// TODO(lazyboy): Investigate ways to move this out to /extensions.
-void ChromeMimeHandlerViewGuestDelegate::AttachHelpers() {
-  content::WebContents* web_contents = guest_->web_contents();
-#if defined(ENABLE_PRINTING)
-#if defined(ENABLE_PRINT_PREVIEW)
-  printing::PrintViewManager::CreateForWebContents(web_contents);
-  printing::PrintPreviewMessageHandler::CreateForWebContents(web_contents);
-#else
-  printing::PrintViewManagerBasic::CreateForWebContents(web_contents);
-#endif  // defined(ENABLE_PRINT_PREVIEW)
-#endif  // defined(ENABLE_PRINTING)
-  pdf::PDFWebContentsHelper::CreateForWebContentsWithClient(
-      web_contents,
-      scoped_ptr<pdf::PDFWebContentsHelperClient>(
-          new ChromePDFWebContentsHelperClient()));
-  extensions::ChromeExtensionWebContentsObserver::CreateForWebContents(
-      web_contents);
-}
-
 bool ChromeMimeHandlerViewGuestDelegate::HandleContextMenu(
     content::WebContents* web_contents,
     const content::ContextMenuParams& params) {