Fixed issue #202

- Updated the OnBeforeClose event in all demos using TChromiumWindow to send a WM_CLOSE message instead of calling "close".
- Fixed all MDI demos. Now the demo will not close automatically when the last browser is closed manually.

demos/Lazarus/JavaScript/JSDialog/JSDialogBrowser.lps

@@ -22,15 +22,15 @@
         <ResourceBaseClass Value="Form"/>
         <IsVisibleTab Value="True"/>
         <EditorIndex Value="1"/>
-        <TopLine Value="107"/>
-        <CursorPos X="40" Y="105"/>
+        <TopLine Value="247"/>
+        <CursorPos X="41" Y="251"/>
         <UsageCount Value="20"/>
         <Loaded Value="True"/>
         <LoadedDesigner Value="True"/>
         <DefaultSyntaxHighlighter Value="Delphi"/>
       </Unit1>
     </Units>
-    <JumpHistory Count="4" HistoryIndex="3">
+    <JumpHistory Count="5" HistoryIndex="4">
       <Position1>
         <Filename Value="JSDialogBrowser.lpr"/>
       </Position1>
@@ -46,6 +46,10 @@
         <Filename Value="uJSDialogBrowser.pas"/>
         <Caret Line="88" Column="386" TopLine="70"/>
       </Position4>
+      <Position5>
+        <Filename Value="uJSDialogBrowser.pas"/>
+        <Caret Line="72" Column="32" TopLine="64"/>
+      </Position5>
     </JumpHistory>
     <RunParams>
       <FormatVersion Value="2"/>

demos/Lazarus/JavaScript/JSDialog/uJSDialogBrowser.pas

@@ -248,7 +248,7 @@ end;
 procedure TJSDialogBrowserFrm.ChromiumWindow1BeforeClose(Sender: TObject);
 begin
   FCanClose := True;
-  Close;
+  PostMessage(Handle, WM_CLOSE, 0, 0);
 end;
 
 procedure TJSDialogBrowserFrm.ChromiumWindow1Close(Sender: TObject);