[DevTools] More UX fixes in Device Mode.

third_party/WebKit/Source/devtools/front_end/emulation/DeviceModeModel.js

Index: third_party/WebKit/Source/devtools/front_end/emulation/DeviceModeModel.js
diff --git a/third_party/WebKit/Source/devtools/front_end/emulation/DeviceModeModel.js b/third_party/WebKit/Source/devtools/front_end/emulation/DeviceModeModel.js
index be1dca8dd9e8acef5678db8de0b605e0a8493064..a23780a975aebeaf4630397ff41afc48d86f9227 100644
--- a/third_party/WebKit/Source/devtools/front_end/emulation/DeviceModeModel.js
+++ b/third_party/WebKit/Source/devtools/front_end/emulation/DeviceModeModel.js
@@ -45,7 +45,7 @@ WebInspector.DeviceModeModel = function(updateCallback)
     this._deviceScaleFactorSetting = WebInspector.settings.createSetting("emulation.deviceScaleFactor", 0);
     this._deviceScaleFactorSetting.addChangeListener(this._deviceScaleFactorSettingChanged, this);
 
-    this._deviceOutlineSetting = WebInspector.settings.createSetting("emulation.deviceOutline", false);
+    this._deviceOutlineSetting = WebInspector.settings.moduleSetting("emulation.showDeviceOutline");
     this._deviceOutlineSetting.addChangeListener(this._deviceOutlineSettingChanged, this);
 
     /** @type {!WebInspector.DeviceModeModel.Type} */
@@ -544,7 +544,7 @@ WebInspector.DeviceModeModel.prototype = {
             screenSize.width * scale,
             screenSize.height * scale);
         this._outlineRect = new WebInspector.Rect(
-            Math.max(0, this._screenRect.left - outline.left * scale),
+            this._screenRect.left - outline.left * scale,
             0,
             (outline.left + screenSize.width + outline.right) * scale,
             (outline.top + screenSize.height + outline.bottom) * scale);