DevTools: Introduce device dependent CPU throttling rates.

third_party/WebKit/Source/devtools/front_end/timeline/TimelinePanel.js

Index: third_party/WebKit/Source/devtools/front_end/timeline/TimelinePanel.js
diff --git a/third_party/WebKit/Source/devtools/front_end/timeline/TimelinePanel.js b/third_party/WebKit/Source/devtools/front_end/timeline/TimelinePanel.js
index 5506797c82a18e1a4e4064d07616a2ee2f5412b5..0c3010859e10694e447a74d06da2fa1cdc764753 100644
--- a/third_party/WebKit/Source/devtools/front_end/timeline/TimelinePanel.js
+++ b/third_party/WebKit/Source/devtools/front_end/timeline/TimelinePanel.js
@@ -406,24 +406,52 @@ WebInspector.TimelinePanel.prototype = {
 
         if (Runtime.experiments.isEnabled("cpuThrottling")) {
             this._panelToolbar.appendSeparator();
-            this._cpuThrottlingCombobox = new WebInspector.ToolbarComboBox(this._onCPUThrottlingChanged.bind(this));
-            /**
-             * @param {string} name
-             * @param {number} value
-             * @this {WebInspector.TimelinePanel}
-             */
-            function addGroupingOption(name, value)
-            {
-                var option = this._cpuThrottlingCombobox.createOption(name, "", String(value));
-                this._cpuThrottlingCombobox.addOption(option);
-                if (value === this._cpuThrottlingManager.rate())
-                    this._cpuThrottlingCombobox.select(option);
+            this._panelToolbar.appendToolbarItem(this._createCPUThrottlingControl());
+        }
+    },
+
+    /**
+     * @return {!WebInspector.ToolbarItem}
+     */
+    _createCPUThrottlingControl: function()
+    {
+        var cpuThrottlingManager = this._cpuThrottlingManager;
+        var cpuThrottlingCombobox = new WebInspector.ToolbarComboBox(this._onCPUThrottlingChanged.bind(this));
+        this._cpuThrottlingCombobox = cpuThrottlingCombobox;
+        /**
+         * @param {string} name
+         * @param {number} value
+         */
+        function addGroupingOption(name, value)
+        {
+            var option = cpuThrottlingCombobox.createOption(name, "", String(value));
+            cpuThrottlingCombobox.addOption(option);
+            return option;
+        }
+        function addSeparator()
+        {
+            addGroupingOption("", 0).disabled = true;
+        }
+
+        cpuThrottlingCombobox.select(addGroupingOption(WebInspector.UIString("No CPU throttling"), 1));
+        addSeparator();
+
+        var hostOctaneScore = WebInspector.settings.createSetting("hostOctaneScore", 0).get();
+        if (hostOctaneScore) {
+            var emulatedDevicesList = WebInspector.EmulatedDevicesList.instance();
+            var devices = [].concat(emulatedDevicesList.standard(), emulatedDevicesList.custom());
+            for (var device of devices) {
+                if (!device.octaneScore || device.octaneScore > hostOctaneScore)
+                    continue;
+                var rate = hostOctaneScore / device.octaneScore;
+                addGroupingOption(WebInspector.UIString("%s\u2003(%.1fx slowdown)", device.title, rate), rate);
             }
-            addGroupingOption.call(this, WebInspector.UIString("No CPU throttling"), 1);
-            for (var rate of [1.2, 1.5, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 15, 20, 30, 50])
-                addGroupingOption.call(this, WebInspector.UIString("%fx slowdown", rate), rate);
-            this._panelToolbar.appendToolbarItem(this._cpuThrottlingCombobox);
+            addSeparator();
         }
+
+        [1.2, 1.5, 2, 3, 4, 5, 8, 10, 15, 20, 30, 50].forEach(rate => addGroupingOption(WebInspector.UIString("%fx slowdown", rate), rate));
+
+        return cpuThrottlingCombobox;
     },
 
     _prepareToLoadTimeline: function()