[Presentation API] Plumbing the |defaultpresentationstart| event from Blink to browser/Mojo.

content/browser/presentation/presentation_service_impl.h

 // Copyright 2015 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 CONTENT_BROWSER_PRESENTATION_PRESENTATION_SERVICE_IMPL_H_
 #define CONTENT_BROWSER_PRESENTATION_PRESENTATION_SERVICE_IMPL_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/containers/hash_tables.h"
@@ skipping 36 matching lines @@
   // |request|: The instance will be bound to this request. Used for Mojo setup.
   static void CreateMojoService(
       RenderFrameHost* render_frame_host,
       mojo::InterfaceRequest<presentation::PresentationService> request);
 
  private:
   using ScreenAvailabilityMojoCallback = mojo::Callback<void(bool)>;
   using NewSessionMojoCallback =
       mojo::Callback<void(presentation::PresentationSessionInfoPtr,
           presentation::PresentationErrorPtr)>;
+  using DefaultPresentationMojoCallback =
+      mojo::Callback<void(presentation::PresentationSessionInfoPtr)>;
 
   friend class PresentationServiceImplTest;
   FRIEND_TEST_ALL_PREFIXES(PresentationServiceImplTest, RemoveAllListeners);
   FRIEND_TEST_ALL_PREFIXES(PresentationServiceImplTest,
       DidNavigateThisFrame);
   FRIEND_TEST_ALL_PREFIXES(PresentationServiceImplTest,
       DidNavigateNotThisFrame);
   FRIEND_TEST_ALL_PREFIXES(PresentationServiceImplTest,
       ThisRenderFrameDeleted);
   FRIEND_TEST_ALL_PREFIXES(PresentationServiceImplTest,
       NotThisRenderFrameDeleted);
 
   // |render_frame_host|: The RFH this instance is associated with.
   // |web_contents|: The WebContents to observe.
   // |delegate|: Where Presentation API requests are delegated to. Not owned
   // by this class.
   PresentationServiceImpl(
       RenderFrameHost* render_frame_host,
       WebContents* web_contents,
       PresentationServiceDelegate* delegate);
 
   // PresentationService implementation.
   void GetScreenAvailability(
       const mojo::String& presentation_url,
       const ScreenAvailabilityMojoCallback& callback) override;
   void OnScreenAvailabilityListenerRemoved() override;
+  void ListenForDefaultPresentationStart(
+      const DefaultPresentationMojoCallback& callback) override;
   void StartSession(
       const mojo::String& presentation_url,
       const mojo::String& presentation_id,
       const NewSessionMojoCallback& callback) override;
   void JoinSession(
       const mojo::String& presentation_url,
       const mojo::String& presentation_id,
       const NewSessionMojoCallback& callback) override;
 
   // mojo::InterfaceImpl override.
@@ skipping 62 matching lines @@
       availability_contexts_;
 
   std::string default_presentation_url_;
 
   DISALLOW_COPY_AND_ASSIGN(PresentationServiceImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_PRESENTATION_PRESENTATION_SERVICE_IMPL_H_