DevTools: Change default timeline overview mode to events.

Source/devtools/front_end/common/Settings.js

Index: Source/devtools/front_end/common/Settings.js
diff --git a/Source/devtools/front_end/common/Settings.js b/Source/devtools/front_end/common/Settings.js
index 1771bd7ef24638a3e35b2a222051e7925f00abf6..fb7c3756ae82906495e39e4a39e54d4b32e8d74a 100644
--- a/Source/devtools/front_end/common/Settings.js
+++ b/Source/devtools/front_end/common/Settings.js
@@ -333,7 +333,7 @@ WebInspector.VersionController = function()
 }
 
 WebInspector.VersionController._currentVersionName = "inspectorVersion";
-WebInspector.VersionController.currentVersion = 12;
+WebInspector.VersionController.currentVersion = 13;
 
 WebInspector.VersionController.prototype = {
     updateVersion: function()
@@ -581,6 +581,11 @@ WebInspector.VersionController.prototype = {
         }
     },
 
+    _updateVersionFrom12To13: function()
+    {
+        WebInspector.settings.createSetting("timelineOverviewMode", "").remove();
+    },
+
     /**
      * @param {!WebInspector.Setting} breakpointsSetting
      * @param {number} maxBreakpointsCount