[DevTools] Clear networkConditions setting for all users because of behavior change.

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 c0acc88a9a3dd4ec6fe51a7e105d18fcf65382bf..2a5c78348b492c64e30428a5a7f4eee581c0e6fc 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 = 13;
+WebInspector.VersionController.currentVersion = 14;
 
 WebInspector.VersionController.prototype = {
     updateVersion: function()
@@ -574,6 +574,12 @@ WebInspector.VersionController.prototype = {
         WebInspector.settings.createSetting("timelineOverviewMode", "").remove();
     },
 
+    _updateVersionFrom13To14: function()
+    {
+        var defaultValue = { "throughput": -1, "latency": 0 };
+        WebInspector.settings.createSetting("networkConditions", defaultValue).set(defaultValue);
+    },
+
     _migrateSettingsFromLocalStorage: function()
     {
         // This step migrates all the settings except for the ones below into the browser profile.