media: Add MediaPermission interface and MediaPermissionDispatcher.

content/browser/permissions/permission_service_impl.cc

 // Copyright 2014 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.
 
 #include "content/browser/permissions/permission_service_impl.h"
 
 #include "content/public/browser/content_browser_client.h"
 
 namespace content {
 
 namespace {
 
 PermissionType PermissionNameToPermissionType(PermissionName name) {
   switch(name) {
     case PERMISSION_NAME_GEOLOCATION:
       return PERMISSION_GEOLOCATION;
     case PERMISSION_NAME_MIDI_SYSEX:
       return PERMISSION_MIDI_SYSEX;
     case PERMISSION_NAME_NOTIFICATIONS:
       return PERMISSION_NOTIFICATIONS;
+    case PERMISSION_NAME_PROTECTED_MEDIA_IDENTIFIER:
+      return PERMISSION_PROTECTED_MEDIA;

[xhwang, 2015/01/22 23:40:54]

We have some inconsistency here:

PROTECTED_MEDIA_IDENTIFIER vs PROTECTED_MEDIA

We are using "identifier" in most cases and I think we should fix
"PERMISSION_PROTECTED_MEDIA". WDYT?

[sandersd (OOO until July 31), 2015/01/24 00:49:21]

I agree, consistency is good, and the identifier suffix is much clearer.

[xhwang, 2015/01/26 21:49:06]

sg; I'll update the name in a separate CL.

   }
 
   NOTREACHED();
   return PERMISSION_NUM;
 }
 
 } // anonymous namespace
 
 PermissionServiceImpl::PendingRequest::PendingRequest(PermissionType permission,
                                                       const GURL& origin)
@@ skipping 85 matching lines @@
   GURL embedding_origin = context_->GetEmbeddingOrigin();
 
   callback.Run(GetContentClient()->browser()->GetPermissionStatus(
       PermissionNameToPermissionType(permission),
       context_->GetBrowserContext(),
       GURL(origin),
       embedding_origin.is_empty() ? GURL(origin) : embedding_origin));
 }
 
 }  // namespace content