Add support for shared texture and external BeginFrame in OSR mode (issue #1006)

- Add CefWindowInfo::shared_texture_enabled and
  CefRenderHandler::OnAcceleratedPaint for shared texture support. Currently
  only supported on Windows (D3D11).
- Add CefWindowInfo::external_begin_frame_enabled and
  CefBrowserHost::SendExternalBeginFrame for external begin frame support.

patch/patch.cfg

@@ -103,11 +103,6 @@ patches = [
     # https://bitbucket.org/chromiumembedded/cef/issues/1565
     'name': 'web_contents_1257_1565',
   },
-  {
-    # Allow creation of a custom SoftwareOutputDevice.
-    # https://bitbucket.org/chromiumembedded/cef/issues/1368
-    'name': 'compositor_1368',
-  },
   {
     # Support custom RenderWidgetHostViewOSR for BrowserPluginGuest.
     # https://bitbucket.org/chromiumembedded/cef/issues/1565
@@ -365,6 +360,11 @@ patches = [
     # https://bugs.chromium.org/p/chromium/issues/detail?id=757974#c23
     'name': 'mac_gpu',
   },
+  {
+    # Support rendering to a hardware GL/D3D texture/surface provided by the client
+    # https://bitbucket.org/chromiumembedded/cef/issues/1006
+    'name': 'external_textures_1006',
+  },
   {
     # Fix crash in CookieMonsterChangeDispatcher::Subscription destructor.
     # https://bugs.chromium.org/p/chromium/issues/detail?id=729800#c48