Reify view ownership as a message pipe.

examples/ui/pdf_viewer/pdf_viewer.cc

 // Copyright 2014 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.
 
 #include <memory>
 #include <string>
 
 #include "base/bind.h"
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 99 matching lines @@
     return std::make_shared<PDFDocument>(shared_from_this(), doc, data);
   }
 };
 
 class PDFDocumentView : public mojo::ui::GaneshView,
                         public mojo::ui::ChoreographerDelegate,
                         public mojo::ui::InputListener {
  public:
   PDFDocumentView(
       mojo::ApplicationImpl* app_impl,
-      const std::shared_ptr<PDFDocument>& pdf_document,
-      const mojo::ui::ViewProvider::CreateViewCallback& create_view_callback)
-      : GaneshView(app_impl, "PDFDocumentViewer", create_view_callback),
+      mojo::InterfaceRequest<mojo::ui::ViewOwner> view_owner_request,
+      const std::shared_ptr<PDFDocument>& pdf_document)
+      : GaneshView(app_impl, view_owner_request.Pass(), "PDFDocumentViewer"),
         pdf_document_(pdf_document),
         choreographer_(scene(), this),
         input_handler_(view_service_provider(), this) {
     DCHECK(pdf_document_);
   }
 
   ~PDFDocumentView() override {}
 
  private:
   // |GaneshView|:
@@ skipping 116 matching lines @@
  public:
   PDFContentViewProviderApp(const std::shared_ptr<PDFLibrary>& pdf_library,
                             const std::shared_ptr<PDFDocument>& pdf_document)
       : pdf_library_(pdf_library), pdf_document_(pdf_document) {
     DCHECK(pdf_library_);
     DCHECK(pdf_document_);
   }
 
   ~PDFContentViewProviderApp() override {}
 
-  bool CreateView(
+  void CreateView(
       const std::string& connection_url,
+      mojo::InterfaceRequest<mojo::ui::ViewOwner> view_owner_request,
       mojo::InterfaceRequest<mojo::ServiceProvider> services,
-      mojo::ServiceProviderPtr exposed_services,
-      const mojo::ui::ViewProvider::CreateViewCallback& callback) override {
-    new PDFDocumentView(app_impl(), pdf_document_, callback);
-    return true;
+      mojo::ServiceProviderPtr exposed_services) override {
+    new PDFDocumentView(app_impl(), view_owner_request.Pass(), pdf_document_);
   }
 
  private:
   std::shared_ptr<PDFLibrary> pdf_library_;
   std::shared_ptr<PDFDocument> pdf_document_;
 
   DISALLOW_COPY_AND_ASSIGN(PDFContentViewProviderApp);
 };
 
 class PDFContentViewerApp : public mojo::ui::ContentViewerApp {
@@ skipping 20 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(PDFContentViewerApp);
 };
 
 }  // namespace examples
 
 MojoResult MojoMain(MojoHandle application_request) {
   mojo::ApplicationRunnerChromium runner(new examples::PDFContentViewerApp());
   return runner.Run(application_request);
 }