[WORK_IN_PROGRESS] PDF::Save() fix for out-of-process-pdf.

extensions/browser/guest_view/mime_handler_view/mime_handler_view_guest.cc

Index: extensions/browser/guest_view/mime_handler_view/mime_handler_view_guest.cc
diff --git a/extensions/browser/guest_view/mime_handler_view/mime_handler_view_guest.cc b/extensions/browser/guest_view/mime_handler_view/mime_handler_view_guest.cc
index 41e076000f5b74660cef82ba4fa8b7c978f51ee4..4b65b29631e5c16281f37dd085ed40ec909fe9cc 100644
--- a/extensions/browser/guest_view/mime_handler_view/mime_handler_view_guest.cc
+++ b/extensions/browser/guest_view/mime_handler_view/mime_handler_view_guest.cc
@@ -8,9 +8,11 @@
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/common/url_constants.h"
+#include "extensions/browser/api/extensions_api_client.h"
 #include "extensions/browser/guest_view/guest_view_constants.h"
 #include "extensions/browser/guest_view/guest_view_manager.h"
 #include "extensions/browser/guest_view/mime_handler_view/mime_handler_view_constants.h"
+#include "extensions/browser/guest_view/mime_handler_view/mime_handler_view_guest_delegate.h"
 #include "extensions/common/feature_switch.h"
 #include "extensions/strings/grit/extensions_strings.h"
 #include "net/base/url_util.h"
@@ -35,7 +37,9 @@ GuestViewBase* MimeHandlerViewGuest::Create(
 MimeHandlerViewGuest::MimeHandlerViewGuest(
     content::BrowserContext* browser_context,
     int guest_instance_id)
-    : GuestView<MimeHandlerViewGuest>(browser_context, guest_instance_id) {
+    : GuestView<MimeHandlerViewGuest>(browser_context, guest_instance_id),
+      delegate_(
+          ExtensionsAPIClient::Get()->CreateMimeHandlerViewGuestDelegate()) {
 }
 
 MimeHandlerViewGuest::~MimeHandlerViewGuest() {
@@ -55,9 +59,9 @@ void MimeHandlerViewGuest::CreateWebContents(
     const base::DictionaryValue& create_params,
     const WebContentsCreatedCallback& callback) {
   std::string orig_mime_type;
-  DCHECK(
-      create_params.GetString(mime_handler_view::kMimeType, &orig_mime_type) &&
-      !orig_mime_type.empty());
+  bool success =
+      create_params.GetString(mime_handler_view::kMimeType, &orig_mime_type);
+  DCHECK(success && !orig_mime_type.empty());
   std::string guest_site_str;
   // Note that we put a prefix "mime-" before the mime type so that this
   // can never collide with an extension ID.
@@ -85,8 +89,8 @@ void MimeHandlerViewGuest::CreateWebContents(
 
 void MimeHandlerViewGuest::DidAttachToEmbedder() {
   std::string src;
-  DCHECK(attach_params()->GetString(mime_handler_view::kSrc, &src) &&
-         !src.empty());
+  bool success = attach_params()->GetString(mime_handler_view::kSrc, &src);
+  DCHECK(success && !src.empty());
   web_contents()->GetController().LoadURL(
       GURL(src),
       content::Referrer(),
@@ -94,4 +98,9 @@ void MimeHandlerViewGuest::DidAttachToEmbedder() {
       std::string());
 }
 
+void MimeHandlerViewGuest::DidInitialize() {
+  if (delegate_)
+    delegate_->OnAttachHelpers(web_contents());
+}
+
 }  // namespace extensions