EME: Update tests so 'audioCapabilities' always provided

third_party/WebKit/LayoutTests/media/encrypted-media/encrypted-media-waiting-for-a-key.html

Index: third_party/WebKit/LayoutTests/media/encrypted-media/encrypted-media-waiting-for-a-key.html
diff --git a/third_party/WebKit/LayoutTests/media/encrypted-media/encrypted-media-waiting-for-a-key.html b/third_party/WebKit/LayoutTests/media/encrypted-media/encrypted-media-waiting-for-a-key.html
index 712557bd7248fa66c0dbc209d00c3f481d1a60ce..2cac0d2b0892cd06cf72129d15ba7bd6b1a6b301 100644
--- a/third_party/WebKit/LayoutTests/media/encrypted-media/encrypted-media-waiting-for-a-key.html
+++ b/third_party/WebKit/LayoutTests/media/encrypted-media/encrypted-media-waiting-for-a-key.html
@@ -20,6 +20,7 @@
             promise_test(function(test)
             {
                 var video = document.getElementById('testVideo');
+                var content = '../content/test-encrypted.webm';
                 var initData;
                 var initDataType;
                 var mediaKeySession;
@@ -43,14 +44,14 @@
                 var rawKey = new Uint8Array([0xeb, 0xdd, 0x62, 0xf1, 0x68, 0x14, 0xd2, 0x7b,
                                              0x68, 0xef, 0x12, 0x2a, 0xfc, 0xe4, 0xae, 0x3c]);
 
-                return navigator.requestMediaKeySystemAccess('org.w3.clearkey', [{}]).then(function(access) {
+                return navigator.requestMediaKeySystemAccess('org.w3.clearkey', getConfigurationForFile(content)).then(function(access) {
                     debugMessage = 'createMediaKeys()';
                     return access.createMediaKeys();
                 }).then(function(mediaKeys) {
                     debugMessage = 'setMediaKeys()';
                     return video.setMediaKeys(mediaKeys);
                 }).then(function() {
-                    video.src = '../content/test-encrypted.webm';
+                    video.src = content;
                     video.play();
                     debugMessage = 'wait_for_encrypted_event()';
                     return wait_for_encrypted_event(video);