DevTools: make responsive design a master switch for emulation.

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 de480afab08d2b28ae63bda3c585f00d26495ed7..b9e76e3966d65f6ec5f193c86213e611a4607eb1 100644
--- a/Source/devtools/front_end/common/Settings.js
+++ b/Source/devtools/front_end/common/Settings.js
@@ -90,9 +90,7 @@ WebInspector.Settings = function()
     this.pauseOnExceptionEnabled = this.createSetting("pauseOnExceptionEnabled", false);
     this.pauseOnCaughtException = this.createSetting("pauseOnCaughtException", false);
     this.enableAsyncStackTraces = this.createSetting("enableAsyncStackTraces", false);
-
-    this.responsiveDesign = {};
-    this.responsiveDesign.enabled = this.createSetting("responsiveDesign.enabled", false);
+    this.responsiveDesignEnabled = this.createSetting("responsiveDesignEnabled", true);
 }
 
 WebInspector.Settings.prototype = {
@@ -320,7 +318,8 @@ WebInspector.ExperimentsSettings = function(experimentsEnabled)
     this.heapAllocationProfiler = this._createExperiment("allocationProfiler", "Heap allocation profiler");
     this.heapSnapshotStatistics = this._createExperiment("heapSnapshotStatistics", "Heap snapshot statistics", true);
     this.layersPanel = this._createExperiment("layersPanel", "Layers panel", true);
-    this.responsiveDesign = this._createExperiment("responsiveDesign", "Responsive design", true);
+    this.networkConditions = this._createExperiment("networkConditions", "Network conditions", true);
+    this.responsiveDesign = this._createExperiment("responsiveDesign", "Responsive design");
     this.timelineFlameChart = this._createExperiment("timelineFlameChart", "Timeline flame chart");
     this.timelineOnTraceEvents = this._createExperiment("timelineOnTraceEvents", "Timeline on trace events", true);
     this.timelinePowerProfiler = this._createExperiment("timelinePowerProfiler", "Timeline power profiler");