Move ChromeOS login media access logic into a MediaAccessHandler

chrome/browser/media/public_session_media_access_handler.h

 // Copyright 2016 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 CHROME_BROWSER_MEDIA_PUBLIC_SESSION_MEDIA_ACCESS_HANDLER_H_
 #define CHROME_BROWSER_MEDIA_PUBLIC_SESSION_MEDIA_ACCESS_HANDLER_H_
 
 #include "base/macros.h"
 #include "chrome/browser/extensions/extension_install_prompt.h"
 #include "chrome/browser/media/extension_media_access_handler.h"
@@ skipping 13 matching lines @@
 // uses the capture APIs for the first time, we show the user a dialog where
 // they can choose whether to allow the extension access to camera and/or
 // microphone. Note: camera and microphone are used through audioCapture and
 // videoCapture manifest permissions which are limited to platform apps only.
 class PublicSessionMediaAccessHandler : public MediaAccessHandler {
  public:
   PublicSessionMediaAccessHandler();
   ~PublicSessionMediaAccessHandler() override;
 
   // MediaAccessHandler implementation.
-  bool SupportsStreamType(const content::MediaStreamType type,
+  bool SupportsStreamType(content::WebContents* web_contents,
+                          const content::MediaStreamType type,
                           const extensions::Extension* extension) override;
   bool CheckMediaAccessPermission(
       content::WebContents* web_contents,
       const GURL& security_origin,
       content::MediaStreamType type,
       const extensions::Extension* extension) override;
   void HandleRequest(content::WebContents* web_contents,
                      const content::MediaStreamRequest& request,
                      const content::MediaResponseCallback& callback,
                      const extensions::Extension* extension) override;
 
  private:
   // Helper function used to chain the HandleRequest call into the original
   // inside of ExtensionMediaAccessHandler.
   void ChainHandleRequest(
       content::WebContents* web_contents,
       const content::MediaStreamRequest& request,
       const content::MediaResponseCallback& callback,
       const extensions::Extension* extension,
       const extensions::PermissionIDSet& allowed_permissions);
 
   ExtensionMediaAccessHandler extension_media_access_handler_;
 
   DISALLOW_COPY_AND_ASSIGN(PublicSessionMediaAccessHandler);
 };
 
 #endif  // CHROME_BROWSER_MEDIA_PUBLIC_SESSION_MEDIA_ACCESS_HANDLER_H_