media: Add MediaPermission interface and MediaPermissionDispatcher.

media/blink/webencryptedmediaclient_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 "webencryptedmediaclient_impl.h"
 
+#include "base/bind.h"
 #include "base/logging.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "media/base/key_systems.h"
+#include "media/base/media_permission.h"
 #include "net/base/mime_util.h"
 #include "third_party/WebKit/public/platform/WebEncryptedMediaRequest.h"
 #include "third_party/WebKit/public/platform/WebMediaKeySystemConfiguration.h"
 #include "third_party/WebKit/public/platform/WebString.h"
 #include "third_party/WebKit/public/platform/WebVector.h"
 #include "webcontentdecryptionmoduleaccess_impl.h"
 
 namespace media {
 
 static bool IsSupportedContentType(
@@ skipping 103 matching lines @@
   }
 
   // TODO(sandersd): Prompt for distinctive identifiers and/or persistent state
   // if required. Make sure that future checks are silent.
   // http://crbug.com/446263.
 
   return true;
 }
 
 WebEncryptedMediaClientImpl::WebEncryptedMediaClientImpl(
-    scoped_ptr<CdmFactory> cdm_factory)
-    : cdm_factory_(cdm_factory.Pass()) {
+    scoped_ptr<CdmFactory> cdm_factory,
+    MediaPermission* media_permission)
+    : cdm_factory_(cdm_factory.Pass()), media_permission_(media_permission) {
 }
 
 WebEncryptedMediaClientImpl::~WebEncryptedMediaClientImpl() {
 }
 
+static void OnPermissionStatus(bool granted) {
+  DVLOG(2) << __FUNCTION__ << ": " << granted;
+}
+
 void WebEncryptedMediaClientImpl::requestMediaKeySystemAccess(
     blink::WebEncryptedMediaRequest request) {
   // TODO(jrummell): This should be asynchronous.
 
+  GURL security_origin_as_gurl(request.securityOrigin().toString());
+  media_permission_->HasPermission(MediaPermission::PROTECTED_MEDIA_IDENTIFIER,
+                                   security_origin_as_gurl,
+                                   base::Bind(&OnPermissionStatus));

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

FYI: This is how I test this CL with
LayoutTests/media/encrypted-media/encrypted-media-requestmediakeysystemaccess.html
test.

+
   // Continued from requestMediaKeySystemAccess(), step 7, from
   // https://w3c.github.io/encrypted-media/#requestmediakeysystemaccess
   //
   // 7.1 If keySystem is not one of the Key Systems supported by the user
   //     agent, reject promise with with a new DOMException whose name is
   //     NotSupportedError. String comparison is case-sensitive.
   if (!base::IsStringASCII(request.keySystem())) {
     request.requestNotSupported("Only ASCII keySystems are supported");
     return;
   }
@@ skipping 36 matching lines @@
       return;
     }
   }
 
   // 7.4 Reject promise with a new DOMException whose name is NotSupportedError.
   request.requestNotSupported(
       "None of the requested configurations were supported.");
 }
 
 }  // namespace media