DevTools: [Console] Display timestamps when the Console timestamps setting is re-enabled

Source/devtools/front_end/ConsoleView.js

Index: Source/devtools/front_end/ConsoleView.js
diff --git a/Source/devtools/front_end/ConsoleView.js b/Source/devtools/front_end/ConsoleView.js
index 5f772d66a8d0a81a030ff6157bcdd59f70f6c63c..f61f842719ccee1c993661d424f2fa7c4c216836 100644
--- a/Source/devtools/front_end/ConsoleView.js
+++ b/Source/devtools/front_end/ConsoleView.js
@@ -125,6 +125,7 @@ WebInspector.ConsoleView = function(hideContextSelector)
     this.messagesElement.insertBefore(this._filterStatusMessageElement, this.topGroup.element);
 
     this._updateFilterStatus();
+    WebInspector.settings.consoleTimestampsEnabled.addChangeListener(this._consoleTimestampsSettingChanged, this);
 }
 
 WebInspector.ConsoleView.prototype = {
@@ -161,6 +162,14 @@ WebInspector.ConsoleView.prototype = {
 
     },
 
+    _consoleTimestampsSettingChanged: function(event)
+    {
+        var enabled = /** @type {boolean} */ (event.data);
+        this._messageToViewMessage.values().forEach(function(viewMessage) {
+            viewMessage.updateTimestamp(enabled);
+        })
+    },
+
     /**
      * @return {!Element}
      */