DevTools: extract NetworkConditionsSelector into its own module

third_party/WebKit/Source/devtools/front_end/network_conditions/NetworkPriorities.js

Index: third_party/WebKit/Source/devtools/front_end/network_conditions/NetworkPriorities.js
diff --git a/third_party/WebKit/Source/devtools/front_end/network_conditions/NetworkPriorities.js b/third_party/WebKit/Source/devtools/front_end/network_conditions/NetworkPriorities.js
new file mode 100644
index 0000000000000000000000000000000000000000..6f7a67021318ca9532fde217fa60d25598f36261
--- /dev/null
+++ b/third_party/WebKit/Source/devtools/front_end/network_conditions/NetworkPriorities.js
@@ -0,0 +1,71 @@
+// Copyright 2017 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.
+
+/**
+ * @param {!Protocol.Network.ResourcePriority} priority
+ * @return {string}
+ */
+NetworkConditions.uiLabelForPriority = function(priority) {
+  var map = NetworkConditions.priorityUiLabelMap();
+  return map.get(priority) || '';
+};
+
+/**
+ * @param {string} priorityLabel
+ * @return {string}
+ */
+NetworkConditions.uiLabelToPriority = function(priorityLabel) {
+  /** @type {!Map<string, !Protocol.Network.ResourcePriority>} */
+  var labelToPriorityMap = NetworkConditions.uiLabelToPriority._uiLabelToPriorityMap;
+
+  if (labelToPriorityMap)
+    return labelToPriorityMap.get(priorityLabel);
+
+  labelToPriorityMap = new Map();
+  NetworkConditions.priorityUiLabelMap().forEach((value, key) => labelToPriorityMap.set(value, key));
+  NetworkConditions.uiLabelToPriority._uiLabelToPriorityMap = labelToPriorityMap;
+  return labelToPriorityMap.get(priorityLabel) || '';
+};
+
+/**
+ * @return {!Map<!Protocol.Network.ResourcePriority, string>}
+ */
+NetworkConditions.priorityUiLabelMap = function() {
+  /** @type {!Map<!Protocol.Network.ResourcePriority, string>} */
+  var map = NetworkConditions.priorityUiLabelMap._priorityUiLabelMap;
+
+  if (map)
+    return map;
+
+  map = new Map();
+  map.set(Protocol.Network.ResourcePriority.VeryLow, Common.UIString('Lowest'));
+  map.set(Protocol.Network.ResourcePriority.Low, Common.UIString('Low'));
+  map.set(Protocol.Network.ResourcePriority.Medium, Common.UIString('Medium'));
+  map.set(Protocol.Network.ResourcePriority.High, Common.UIString('High'));
+  map.set(Protocol.Network.ResourcePriority.VeryHigh, Common.UIString('Highest'));
+  NetworkConditions.priorityUiLabelMap._priorityUiLabelMap = map;
+
+  return map;
+};
+
+/**
+ * @return {!Map<!Protocol.Network.ResourcePriority, number>}
+ */
+NetworkConditions.prioritySymbolToNumericMap = function() {
+  /** @type {!Map<!Protocol.Network.ResourcePriority, number>} */
+  var priorityMap = NetworkConditions.prioritySymbolToNumericMap._symbolicToNumericPriorityMap;
+
+  if (priorityMap)
+    return priorityMap;
+
+  priorityMap = new Map();
+  priorityMap.set(Protocol.Network.ResourcePriority.VeryLow, 1);
+  priorityMap.set(Protocol.Network.ResourcePriority.Low, 2);
+  priorityMap.set(Protocol.Network.ResourcePriority.Medium, 3);
+  priorityMap.set(Protocol.Network.ResourcePriority.High, 4);
+  priorityMap.set(Protocol.Network.ResourcePriority.VeryHigh, 5);
+  NetworkConditions.prioritySymbolToNumericMap._symbolicToNumericPriorityMap = priorityMap;
+
+  return priorityMap;
+};