Revert of DevTools: Do not save split view size on show mode changes.

LayoutTests/http/tests/inspector/network/network-sidebar-width.html

Index: LayoutTests/http/tests/inspector/network/network-sidebar-width.html
diff --git a/LayoutTests/http/tests/inspector/network/network-sidebar-width.html b/LayoutTests/http/tests/inspector/network/network-sidebar-width.html
index 0295caedb35320e808cb4a759d6593f7396b9ec2..83c118200af5818d163404c5f7aa76bcd88186b4 100644
--- a/LayoutTests/http/tests/inspector/network/network-sidebar-width.html
+++ b/LayoutTests/http/tests/inspector/network/network-sidebar-width.html
@@ -24,14 +24,12 @@
 
         delete settingValue.vertical.size;
         setting.set(settingValue);
-        forceSettingRead(panel._splitView);
         panel._showRequest(request);
         InspectorTest.addResult("Sidebar width: " + panel._splitView.sidebarElement().offsetWidth);
         panel._toggleGridMode();
 
         settingValue.vertical.size = 242;
         setting.set(settingValue);
-        forceSettingRead(panel._splitView);
         panel._showRequest(request);
         InspectorTest.addResult("Sidebar width: " + panel._splitView.sidebarElement().offsetWidth);
         panel._closeVisibleRequest(request);
@@ -41,12 +39,6 @@
 
         InspectorTest.completeTest();
     }
-
-    function forceSettingRead(splitView)
-    {
-        splitView.setVertical(false);
-        splitView.setVertical(true);
-    }
 }
 </script>
 </head>