Adds a field trial to control Web API kill switches.

chrome/browser/permissions/permission_util.cc

Index: chrome/browser/permissions/permission_util.cc
diff --git a/chrome/browser/permissions/permission_util.cc b/chrome/browser/permissions/permission_util.cc
new file mode 100644
index 0000000000000000000000000000000000000000..d7d77eb56a4b9fe2ce35b48309c8bba6edef3178
--- /dev/null
+++ b/chrome/browser/permissions/permission_util.cc
@@ -0,0 +1,37 @@
+// Copyright 2015 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 "chrome/browser/permissions/permission_util.h"
+
+#include "base/logging.h"
+
+// The returned strings must match the RAPPOR metrics in rappor.xml,
+// and any Field Trial configs for the Permissions kill switch e.g.
+// Permissions.Action.Geolocation etc..
+std::string PermissionUtil::GetPermissionString(
+    ContentSettingsType permission) {
+  switch (permission) {
+    case CONTENT_SETTINGS_TYPE_GEOLOCATION:
+      return "Geolocation";
+    case CONTENT_SETTINGS_TYPE_NOTIFICATIONS:
+      return "Notifications";
+    case CONTENT_SETTINGS_TYPE_MIDI_SYSEX:
+      return "MidiSysEx";
+    case CONTENT_SETTINGS_TYPE_PUSH_MESSAGING:
+      return "PushMessaging";
+    case CONTENT_SETTINGS_TYPE_DURABLE_STORAGE:
+      return "DurableStorage";
+#if defined(OS_ANDROID) || defined(OS_CHROMEOS)
+    case CONTENT_SETTINGS_TYPE_PROTECTED_MEDIA_IDENTIFIER:
+      return "ProtectedMediaIdentifier";
+#endif
+    case CONTENT_SETTINGS_TYPE_MEDIASTREAM_MIC:
+      return "AudioCapture";
+    case CONTENT_SETTINGS_TYPE_MEDIASTREAM_CAMERA:
+      return "VideoCapture";
+    default:
+      NOTREACHED();
+      return std::string();
+  }
+}