DevTools: unify Network & CPU throttling

third_party/WebKit/Source/devtools/front_end/mobile_throttling/NetworkThrottlingSelector.js

Index: third_party/WebKit/Source/devtools/front_end/mobile_throttling/NetworkThrottlingSelector.js
diff --git a/third_party/WebKit/Source/devtools/front_end/mobile_throttling/NetworkThrottlingSelector.js b/third_party/WebKit/Source/devtools/front_end/mobile_throttling/NetworkThrottlingSelector.js
new file mode 100644
index 0000000000000000000000000000000000000000..3539db4d22b75062b4944f1aa91bc20cf00e30d7
--- /dev/null
+++ b/third_party/WebKit/Source/devtools/front_end/mobile_throttling/NetworkThrottlingSelector.js
@@ -0,0 +1,65 @@
+// 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.
+
+MobileThrottling.NetworkThrottlingSelector = class {
+  /**
+   * @param {function(!Array<!MobileThrottling.NetworkThrottlingConditionsGroup>):!Array<?SDK.NetworkManager.Conditions>} populateCallback
+   * @param {function(number)} selectCallback
+   * @param {!Common.Setting<!Array<!SDK.NetworkManager.Conditions>>} customNetworkConditionsSetting
+   */
+  constructor(populateCallback, selectCallback, customNetworkConditionsSetting) {
+    this._populateCallback = populateCallback;
+    this._selectCallback = selectCallback;
+    this._customNetworkConditionsSetting = customNetworkConditionsSetting;
+    this._customNetworkConditionsSetting.addChangeListener(this._populateOptions, this);
+    SDK.multitargetNetworkManager.addEventListener(
+        SDK.MultitargetNetworkManager.Events.ConditionsChanged, this._networkConditionsChanged, this);
+    /** @type {!Array<?SDK.NetworkManager.Conditions>} */
+    this._options;
+    this._populateOptions();
+  }
+
+  revealAndUpdate() {
+    Common.Revealer.reveal(this._customNetworkConditionsSetting);
+    this._networkConditionsChanged();
+  }
+
+  /**
+   * @param {!SDK.NetworkManager.Conditions} conditions
+   */
+  optionSelected(conditions) {
+    SDK.multitargetNetworkManager.setNetworkConditions(conditions);
+  }
+
+  _populateOptions() {
+    var disabledGroup = {title: Common.UIString('Disabled'), items: [SDK.NetworkManager.NoThrottlingConditions]};
+    var presetsGroup = {title: Common.UIString('Presets'), items: MobileThrottling.networkPresets};
+    var customGroup = {title: Common.UIString('Custom'), items: this._customNetworkConditionsSetting.get()};
+    this._options = this._populateCallback([disabledGroup, presetsGroup, customGroup]);
+    if (!this._networkConditionsChanged()) {
+      for (var i = this._options.length - 1; i >= 0; i--) {
+        if (this._options[i]) {
+          this.optionSelected(/** @type {!SDK.NetworkManager.Conditions} */ (this._options[i]));
+          break;
+        }
+      }
+    }
+  }
+
+  /**
+   * @return {boolean} returns false if selected condition no longer exists
+   */
+  _networkConditionsChanged() {
+    var value = SDK.multitargetNetworkManager.networkConditions();
+    for (var index = 0; index < this._options.length; ++index) {
+      var option = this._options[index];
+      if (option && option.download === value.download && option.upload === value.upload &&
+          option.latency === value.latency && option.title === value.title) {
+        this._selectCallback(index);
+        return true;
+      }
+    }
+    return false;
+  }
+};