Convert PDF component IPC to mojo.

components/pdf/browser/pdf_web_contents_helper.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef COMPONENTS_PDF_BROWSER_PDF_WEB_CONTENTS_HELPER_H_
 #define COMPONENTS_PDF_BROWSER_PDF_WEB_CONTENTS_HELPER_H_
 
 #include <memory>
 #include <string>
 
 #include "base/callback.h"
 #include "base/macros.h"
+#include "components/pdf/common/pdf.mojom.h"
+#include "content/public/browser/web_contents_binding_set.h"
 #include "content/public/browser/web_contents_observer.h"
 #include "content/public/browser/web_contents_user_data.h"
-#include "ipc/ipc_message.h"
 
 namespace content {
 class WebContents;
 }
 
 namespace pdf {
 
 class PDFWebContentsHelperClient;
 
 // Per-WebContents class to handle PDF messages.
 class PDFWebContentsHelper
     : public content::WebContentsObserver,
-      public content::WebContentsUserData<PDFWebContentsHelper> {
+      public content::WebContentsUserData<PDFWebContentsHelper>,
+      public mojom::PdfService {
  public:
   static void CreateForWebContentsWithClient(
       content::WebContents* contents,
       std::unique_ptr<PDFWebContentsHelperClient> client);
 
  private:
   PDFWebContentsHelper(content::WebContents* web_contents,
                        std::unique_ptr<PDFWebContentsHelperClient> client);
   ~PDFWebContentsHelper() override;
 
-  // content::WebContentsObserver overrides:
-  bool OnMessageReceived(const IPC::Message& message,
-                         content::RenderFrameHost* render_frame_host) override;
+  // mojom::PdfService:
+  void HasUnsupportedFeature() override;
+  void SaveUrlAs(const GURL& url, const content::Referrer& referrer) override;
+  void UpdateContentRestrictions(int32_t content_restrictions) override;
 
-  // Message handlers.
-  void OnHasUnsupportedFeature();
-  void OnSaveURLAs(const GURL& url, const content::Referrer& referrer);
-  void OnUpdateContentRestrictions(int content_restrictions);
-
+  content::WebContentsFrameBindingSet<mojom::PdfService> pdf_service_bindings_;
   std::unique_ptr<PDFWebContentsHelperClient> client_;
 
   DISALLOW_COPY_AND_ASSIGN(PDFWebContentsHelper);
 };
 
 }  // namespace pdf
 
 #endif  // COMPONENTS_PDF_BROWSER_PDF_WEB_CONTENTS_HELPER_H_