[Media Router] Remove desktop capture prompts.

chrome/browser/media/webrtc/desktop_capture_access_handler.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 CHROME_BROWSER_MEDIA_WEBRTC_DESKTOP_CAPTURE_ACCESS_HANDLER_H_
 #define CHROME_BROWSER_MEDIA_WEBRTC_DESKTOP_CAPTURE_ACCESS_HANDLER_H_
 
 #include <list>
 
 #include "chrome/browser/media/capture_access_handler_base.h"
 #include "chrome/browser/media/media_access_handler.h"
 
+namespace extensions {
+class Extension;
+}
+
 // MediaAccessHandler for DesktopCapture API.
 class DesktopCaptureAccessHandler : public CaptureAccessHandlerBase {
  public:
   DesktopCaptureAccessHandler();
   ~DesktopCaptureAccessHandler() override;
 
   // MediaAccessHandler implementation.
   bool SupportsStreamType(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:
   void ProcessScreenCaptureAccessRequest(
       content::WebContents* web_contents,
       const content::MediaStreamRequest& request,
       const content::MediaResponseCallback& callback,
       const extensions::Extension* extension);
 
+  // Returns whether desktop capture is always approved for |extension|.
+  // Currently component extensions and some whitelisted extensions are default
+  // approved.
+  static bool IsDefaultApproved(const extensions::Extension* extension);
 };
 
 #endif  // CHROME_BROWSER_MEDIA_WEBRTC_DESKTOP_CAPTURE_ACCESS_HANDLER_H_