Revert of Public Sessions - prompt the user for pageCapture requests

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"
 #include "chrome/browser/media/media_access_handler.h"
 #include "content/public/common/media_stream_request.h"
 #include "extensions/common/extension_id.h"
-#include "extensions/common/permissions/api_permission_set.h"
 
 // MediaAccessHandler for extension capturing requests in Public Sessions. This
 // class is implemented as a wrapper around ExtensionMediaAccessHandler. It
 // allows for finer access control to audioCapture/videoCapture manifest
 // permission features inside of Public Sessions.
 //
 // In Public Sessions, apps and extensions are force-installed by admin policy
 // so the user does not get a chance to review the permissions for these apps.
 // This is not acceptable from a security/privacy standpoint, so when an app
 // uses the capture APIs for the first time, we show the user a dialog where
@@ skipping 14 matching lines @@
       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);
+  void ChainHandleRequest(content::WebContents* web_contents,
+                          const content::MediaStreamRequest& request,
+                          const content::MediaResponseCallback& callback,
+                          const extensions::Extension* extension);
 
+  // Function used to resolve user decision regarding allowing audio/video.
+  void ResolvePermissionPrompt(content::WebContents* web_contents,
+                               const content::MediaStreamRequest& request,
+                               const content::MediaResponseCallback& callback,
+                               const extensions::Extension* extension,
+                               ExtensionInstallPrompt::Result prompt_result);
+
+  // Class used to cache user choice regarding allowing audio/video capture.
+  class UserChoice {
+   public:
+    // Helper function for checking if audio/video is allowed by user choice.
+    bool IsAllowed(content::MediaStreamType type) const;
+    // Helper function which returns true if audio/video wasn't prompted yet.
+    bool NeedsPrompting(content::MediaStreamType type) const;
+    void Set(content::MediaStreamType type, bool allowed);
+    void SetPrompted(content::MediaStreamType type);
+
+   private:
+    bool audio_prompted_ = false;
+    bool audio_allowed_ = false;
+    bool video_prompted_ = false;
+    bool video_allowed_ = false;
+  };
+
+  std::map<extensions::ExtensionId, UserChoice> user_choice_cache_;
+  std::map<extensions::ExtensionId, std::unique_ptr<ExtensionInstallPrompt>>
+      extension_install_prompt_map_;
   ExtensionMediaAccessHandler extension_media_access_handler_;
 
   DISALLOW_COPY_AND_ASSIGN(PublicSessionMediaAccessHandler);
 };
 
 #endif  // CHROME_BROWSER_MEDIA_PUBLIC_SESSION_MEDIA_ACCESS_HANDLER_H_