[DevTools] Make UI.GlassPane position contentElement for different overlay controls.

third_party/WebKit/Source/devtools/front_end/ui/Toolbar.js

Index: third_party/WebKit/Source/devtools/front_end/ui/Toolbar.js
diff --git a/third_party/WebKit/Source/devtools/front_end/ui/Toolbar.js b/third_party/WebKit/Source/devtools/front_end/ui/Toolbar.js
index 80c23c5188c3560f7380ba53253a005d99f17d14..121478bf95565792d96d54cff2dc32dceaa4c9c3 100644
--- a/third_party/WebKit/Source/devtools/front_end/ui/Toolbar.js
+++ b/third_party/WebKit/Source/devtools/front_end/ui/Toolbar.js
@@ -123,8 +123,9 @@ UI.Toolbar = class {
       var document = button.element.ownerDocument;
       document.documentElement.addEventListener('mouseup', mouseUp, false);
 
-      var optionsGlassPane = new UI.GlassPane(document);
-      var optionsBar = new UI.Toolbar('fill', optionsGlassPane.element);
+      var optionsGlassPane = new UI.GlassPane(document, false /* dimmed */, true /* blockPointerEvents */, event => {});
+      optionsGlassPane.show();
+      var optionsBar = new UI.Toolbar('fill', optionsGlassPane.contentElement);
       optionsBar._contentElement.classList.add('floating');
       const buttonHeight = 26;
 
@@ -167,7 +168,7 @@ UI.Toolbar = class {
       function mouseUp(e) {
         if (e.which !== 1)
           return;
-        optionsGlassPane.dispose();
+        optionsGlassPane.hide();
         document.documentElement.removeEventListener('mouseup', mouseUp, false);
 
         for (var i = 0; i < buttons.length; ++i) {