Added ConsoleBrowser2 and WebpageSnapshot demos

- Split the Lazarus demos directory into "Lazarus_Windows" and "Lazarus_Linux".
- Added OSRExternalPumpBrowser and TinyBrowser2 demos to "Lazarus_Linux".
- Set TBufferPanel.GetScreenScale as virtual.
- Added DevTools to the SchemeRegistrationBrowser demo.
- Modified the SchemeRegistrationBrowser demo to receive XMLHttpRequest requests from JavaScript.

demos/Lazarus_Windows/JavaScript/JSWindowBindingWithObject/uMyV8Accessor.pas

@@ -0,0 +1,92 @@
+// ************************************************************************
+// ***************************** CEF4Delphi *******************************
+// ************************************************************************
+//
+// CEF4Delphi is based on DCEF3 which uses CEF to embed a chromium-based
+// browser in Delphi applications.
+//
+// The original license of DCEF3 still applies to CEF4Delphi.
+//
+// For more information about CEF4Delphi visit :
+//         https://www.briskbard.com/index.php?lang=en&pageid=cef
+//
+//        Copyright © 2020 Salvador Diaz Fau. All rights reserved.
+//
+// ************************************************************************
+// ************ vvvv Original license and comments below vvvv *************
+// ************************************************************************
+(*
+ *                       Delphi Chromium Embedded 3
+ *
+ * Usage allowed under the restrictions of the Lesser GNU General Public License
+ * or alternatively the restrictions of the Mozilla Public License 1.1
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for
+ * the specific language governing rights and limitations under the License.
+ *
+ * Unit owner : Henri Gourvest <hgourvest@gmail.com>
+ * Web site   : http://www.progdigy.com
+ * Repository : http://code.google.com/p/delphichromiumembedded/
+ * Group      : http://groups.google.com/group/delphichromiumembedded
+ *
+ * Embarcadero Technologies, Inc is not permitted to use or redistribute
+ * this source code without explicit permission.
+ *
+ *)
+
+unit uMyV8Accessor;
+
+{$MODE Delphi}
+
+{$I cef.inc}
+
+interface
+
+uses
+  uCEFv8Value, uCEFv8Accessor, uCEFInterfaces, uCEFTypes;
+
+type
+  TMyV8Accessor = class(TCefV8AccessorOwn)
+    protected
+      FMyVal : ustring;
+
+      function Get(const name: ustring; const object_: ICefv8Value; var retval : ICefv8Value; var exception: ustring): Boolean; override;
+      function Set_(const name: ustring; const object_, value: ICefv8Value; var exception: ustring): Boolean; override;
+  end;
+
+implementation
+
+function TMyV8Accessor.Get(const name      : ustring;
+                           const object_   : ICefv8Value;
+                           var   retval    : ICefv8Value;
+                           var   exception : ustring): Boolean;
+begin
+  if (name = 'myval') then
+    begin
+      retval := TCefv8ValueRef.NewString(FMyVal);
+      Result := True;
+    end
+   else
+    Result := False;
+end;
+
+function TMyV8Accessor.Set_(const name      : ustring;
+                            const object_   : ICefv8Value;
+                            const value     : ICefv8Value;
+                            var   exception : ustring): Boolean;
+begin
+  if (name = 'myval') then
+    begin
+      if value.IsString then
+        FMyVal := value.GetStringValue
+       else
+        exception := 'Invalid value type';
+
+      Result := True;
+    end
+   else
+    Result := False;
+end;
+
+end.