Reenable feature policy control over fullscreen

third_party/WebKit/LayoutTests/http/tests/fullscreen/resources/media-file.js

+var audioCodecs = [
+    ["audio/wav", "wav"],
+    ["audio/aac", "m4a"],
+    ["audio/ogg", "oga"]
+];
+
+var videoCodecs = [
+    ["video/mp4", "mp4"],
+    ["video/ogg", "ogv"],
+    ["video/webm","webm"]
+];
+
+function findMediaFile(tagName, name) {
+    var codecs;
+    if (tagName == "audio")
+        codecs = audioCodecs;
+    else
+        codecs = videoCodecs;
+
+    var element = document.getElementsByTagName(tagName)[0];
+    if (!element)
+        element = document.createElement(tagName);
+
+    for (var i = 0; i < codecs.length; ++i) {
+        if (element.canPlayType(codecs[i][0]))
+            return name + "." + codecs[i][1];
+    }
+
+    return "";
+}
+
+function mimeTypeForExtension(extension) {
+    for (var i = 0; i < videoCodecs.length; ++i) {
+        if (extension == videoCodecs[i][1])
+            return videoCodecs[i][0];
+    }
+    for (var i = 0; i < audioCodecs.length; ++i) {
+        if (extension == audioCodecs[i][1])
+            return audioCodecs[i][0];
+    }
+
+    return "";
+}
+
+function mimeTypeForFile(filename) {
+ var lastPeriodIndex = filename.lastIndexOf(".");
+  if (lastPeriodIndex > 0)
+    return mimeTypeForExtension(filename.substring(lastPeriodIndex + 1));
+
+  return "";
+}
+
+function setSrcByTagName(tagName, src) {
+    var elements = document.getElementsByTagName(tagName);
+    if (elements) {
+        for (var i = 0; i < elements.length; ++i)
+            elements[i].src = src;
+    }
+}
+
+function setSrcById(id, src) {
+    var element = document.getElementById(id);
+    if (element)
+        element.src = src;
+}
+
+function stripExtension(filename) {
+  var lastPeriodIndex = filename.lastIndexOf(".");
+  if (lastPeriodIndex > 0)
+    return filename.substring(0, lastPeriodIndex);
+  return filename;
+}