[Media History] Fix crash in WebUI

Fix crash in WebUI caused by mojo.

Fixes: 1048314
Change-Id: I642dfd7a427ff32f09c889540fdd3cea62100ffe
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2036653Reviewed-by: Tommy Steimel <steimel@chromium.org>
Commit-Queue: Becca Hughes <beccahughes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#738006}

chrome/browser/ui/webui/media/media_history_ui.cc

@@ -21,7 +21,7 @@
 #include "content/public/browser/web_ui_data_source.h"
 
 MediaHistoryUI::MediaHistoryUI(content::WebUI* web_ui)
-    : ui::MojoWebUIController(web_ui), receiver_(this) {
+    : ui::MojoWebUIController(web_ui) {
   // Setup the data source behind chrome://media-history.
   std::unique_ptr<content::WebUIDataSource> source(
       content::WebUIDataSource::Create(chrome::kChromeUIMediaHistoryHost));
@@ -39,7 +39,7 @@ MediaHistoryUI::~MediaHistoryUI() = default;
 
 void MediaHistoryUI::BindInterface(
     mojo::PendingReceiver<media_history::mojom::MediaHistoryStore> pending) {
-  receiver_.Bind(std::move(pending));
+  receivers_.Add(this, std::move(pending));
 }
 
 void MediaHistoryUI::GetMediaHistoryStats(

chrome/browser/ui/webui/media/media_history_ui.h

@@ -7,7 +7,7 @@
 
 #include "chrome/browser/media/history/media_history_store.mojom.h"
 #include "mojo/public/cpp/bindings/pending_receiver.h"
-#include "mojo/public/cpp/bindings/receiver.h"
+#include "mojo/public/cpp/bindings/receiver_set.h"
 #include "ui/webui/mojo_web_ui_controller.h"
 
 namespace media_history {
@@ -34,7 +34,7 @@ class MediaHistoryUI : public ui::MojoWebUIController,
  private:
   media_history::MediaHistoryStore* GetMediaHistoryStore();
 
-  mojo::Receiver<media_history::mojom::MediaHistoryStore> receiver_;
+  mojo::ReceiverSet<media_history::mojom::MediaHistoryStore> receivers_;
 
   WEB_UI_CONTROLLER_TYPE_DECL();
 };