[DevTools] Start/stop of timeline recording should set UI controls disabled/enabled respectively.

Source/devtools/front_end/timeline/TimelinePanel.js

Index: Source/devtools/front_end/timeline/TimelinePanel.js
diff --git a/Source/devtools/front_end/timeline/TimelinePanel.js b/Source/devtools/front_end/timeline/TimelinePanel.js
index 6b29e6e664288b6ce4487d5b3da71f082c3b4f90..f486293017ba022e70b5b604e65492020d2d1fb8 100644
--- a/Source/devtools/front_end/timeline/TimelinePanel.js
+++ b/Source/devtools/front_end/timeline/TimelinePanel.js
@@ -330,34 +330,39 @@ WebInspector.TimelinePanel.prototype = {
         var topPaneSidebarElement = this._topPane.sidebarElement();
 
         this._captureStacksSetting = WebInspector.settings.createSetting("timelineCaptureStacks", true);
+        this._captureStacksCheckbox = document.createElement("input");

[aandrey, 2014/07/03 08:00:49]

I'd create an array this._uiControlsCheckboxes, push all input elements into it
and later iterate over the array to disable/enable all elements.

         topPaneSidebarElement.appendChild(WebInspector.SettingsUI.createSettingCheckbox(WebInspector.UIString("Capture stacks"),
-                                          this._captureStacksSetting, true, undefined,
+                                          this._captureStacksSetting, true, this._captureStacksCheckbox,
                                           WebInspector.UIString("Capture JavaScript stack on every timeline event")));
 
         this._captureMemorySetting = WebInspector.settings.createSetting("timelineCaptureMemory", false);
+        this._captureMemoryCheckbox = document.createElement("input");
         topPaneSidebarElement.appendChild(WebInspector.SettingsUI.createSettingCheckbox(WebInspector.UIString("Capture memory"),
-                                          this._captureMemorySetting, true, undefined,
+                                          this._captureMemorySetting, true, this._captureMemoryCheckbox,
                                           WebInspector.UIString("Capture memory information on every timeline event")));
         this._captureMemorySetting.addChangeListener(this._onModeChanged, this);
 
         if (Capabilities.canProfilePower) {
             this._capturePowerSetting = WebInspector.settings.createSetting("timelineCapturePower", false);
+            this._capturePowerCheckbox = document.createElement("input");
             topPaneSidebarElement.appendChild(WebInspector.SettingsUI.createSettingCheckbox(WebInspector.UIString("Capture power"),
-                                              this._capturePowerSetting, true, undefined,
+                                              this._capturePowerSetting, true, this._capturePowerCheckbox,
                                               WebInspector.UIString("Capture power information")));
             this._capturePowerSetting.addChangeListener(this._onModeChanged, this);
         }
 
         if (WebInspector.experimentsSettings.timelineTracingMode.isEnabled()) {
             this._captureTracingSetting = WebInspector.settings.createSetting("timelineCaptureTracing", false);
+            this._captureTracingCheckbox = document.createElement("input");
             topPaneSidebarElement.appendChild(WebInspector.SettingsUI.createSettingCheckbox(WebInspector.UIString("Capture tracing"),
-                                              this._captureTracingSetting, true, undefined,
+                                              this._captureTracingSetting, true, this._captureTracingCheckbox,
                                               WebInspector.UIString("Capture tracing information")));
             this._captureTracingSetting.addChangeListener(this._onModeChanged, this);
         } else if (WebInspector.experimentsSettings.timelineOnTraceEvents.isEnabled()) {
             this._captureLayersAndPicturesSetting = WebInspector.settings.createSetting("timelineCaptureLayersAndPictures", false);
+            this._captureLayersAndPicturesCheckbox = document.createElement("input");
             topPaneSidebarElement.appendChild(WebInspector.SettingsUI.createSettingCheckbox(WebInspector.UIString("Capture pictures"),
-                                              this._captureLayersAndPicturesSetting, true, undefined,
+                                              this._captureLayersAndPicturesSetting, true, this._captureLayersAndPicturesCheckbox,
                                               WebInspector.UIString("Capture graphics layer positions and painted pictures")));
         }
     },
@@ -665,6 +670,23 @@ WebInspector.TimelinePanel.prototype = {
     },
 
     /**
+     * @param {boolean} disabled
+     */
+    _disableUIControls: function(disabled) {
+        this._captureStacksCheckbox.disabled = disabled;
+        this._captureMemoryCheckbox.disabled = disabled;
+        if (Capabilities.canProfilePower)
+            this._capturePowerCheckbox.disabled = disabled;
+
+        if (WebInspector.experimentsSettings.timelineTracingMode.isEnabled()) {
+            this._captureTracingCheckbox.disabled = disabled;
+        } else if (WebInspector.experimentsSettings.timelineOnTraceEvents.isEnabled()) {
+            this._captureLayersAndPicturesCheckbox.disabled = disabled;
+        }
+        WebInspector.inspectorView.setCurrentPanelLocked(disabled);
+    },
+
+    /**
      * @param {boolean} userInitiated
      */
     _startRecording: function(userInitiated)
@@ -679,7 +701,7 @@ WebInspector.TimelinePanel.prototype = {
 
         if (userInitiated)
             WebInspector.userMetrics.TimelineStarted.record();
-        WebInspector.inspectorView.setCurrentPanelLocked(true);
+        this._disableUIControls(true);
     },
 
     _stopRecording: function()
@@ -693,7 +715,7 @@ WebInspector.TimelinePanel.prototype = {
 
         for (var i = 0; i < this._overviewControls.length; ++i)
             this._overviewControls[i].timelineStopped();
-        WebInspector.inspectorView.setCurrentPanelLocked(false);
+        this._disableUIControls(false);
     },
 
     _onProfilingStateChanged: function()