Add content public APIs for Presentation API.

content/public/browser/content_browser_client.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 CONTENT_PUBLIC_BROWSER_CONTENT_BROWSER_CLIENT_H_
 #define CONTENT_PUBLIC_BROWSER_CONTENT_BROWSER_CLIENT_H_
 
 #include <map>
 #include <string>
 #include <utility>
@@ skipping 78 matching lines @@
 class BrowserPluginGuestDelegate;
 class BrowserPpapiHost;
 class BrowserURLHandler;
 class DevToolsManagerDelegate;
 class ExternalVideoSurfaceContainer;
 class LocationProvider;
 class MediaObserver;
 class NavigatorConnectContext;
 class NavigatorConnectServiceFactory;
 class PlatformNotificationService;
+class PresentationServiceDelegate;
 class QuotaPermissionContext;
 class RenderFrameHost;
 class RenderProcessHost;
 class RenderViewHost;
 class ResourceContext;
 class ServiceRegistry;
 class SiteInstance;
 class SpeechRecognitionManagerDelegate;
 class WebContents;
 class WebContentsViewDelegate;
@@ skipping 486 matching lines @@
   // particular NavigatorConnectContext.
   virtual void GetAdditionalNavigatorConnectServices(
       const scoped_refptr<NavigatorConnectContext>& context) {}
 
   // Allows to override the visibility state of a RenderFrameHost.
   // |visibility_state| should not be null. It will only be set if needed.
   virtual void OverridePageVisibilityState(
       RenderFrameHost* render_frame_host,
       blink::WebPageVisibilityState* visibility_state) {}
 
+  // Allows an embedder to provide its own PresentationServiceDelegate
+  // implementation. Returns nullptr if unavailable.
+  virtual PresentationServiceDelegate* GetPresentationServiceDelegate(
+      WebContents* web_contents);
+
 #if defined(OS_POSIX) && !defined(OS_MACOSX)
   // Populates |mappings| with all files that need to be mapped before launching
   // a child process.
   virtual void GetAdditionalMappedFilesForChildProcess(
       const base::CommandLine& command_line,
       int child_process_id,
       FileDescriptorInfo* mappings) {}
 #endif
 
 #if defined(OS_WIN)
@@ skipping 11 matching lines @@
   // Allows an embedder to provide its own ExternalVideoSurfaceContainer
   // implementation.  Return nullptr to disable external surface video.
   virtual ExternalVideoSurfaceContainer*
   OverrideCreateExternalVideoSurfaceContainer(WebContents* web_contents);
 #endif
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_CONTENT_BROWSER_CLIENT_H_