Update to Chromium revision 248478.

- Add new CefSettings.windowless_rendering_enabled value that must be enabled when using windowless (off-screen) rendering.
- Improve naming and documentation for CefWindowInfo members.
- CefBeginTracing now completes asynchronously.
- Rename CefEndTracingAsync to CefEndTracing.
- Rename CefCompletionHandler to CefCompletionCallback.

git-svn-id: https://chromiumembedded.googlecode.com/svn/trunk@1592 5089003a-bbd8-11dd-ad1f-f1f9622dbc98

libcef/browser/browser_host_impl_win.cc

@@ -701,7 +701,7 @@ LRESULT CALLBACK CefBrowserHostImpl::WndProc(HWND hwnd, UINT message,
   case WM_DWMCOMPOSITIONCHANGED:
     // Message sent to top-level windows when composition has been enabled or
     // disabled.
-    if (browser && browser->window_info_.transparent_painting)
+    if (browser && browser->IsTransparent())
       SetAeroGlass(hwnd);
     break;
   }
@@ -739,7 +739,7 @@ bool CefBrowserHostImpl::PlatformCreateWindow() {
   if (!window_info_.window)
     return false;
 
-  if (window_info_.transparent_painting &&
+  if (window_info_.transparent_painting_enabled &&
       !(window_info_.style & WS_CHILD)) {
     // Transparent top-level windows will be given "sheet of glass" effect.
     SetAeroGlass(window_info_.window);
@@ -885,11 +885,11 @@ void CefBrowserHostImpl::PlatformHandleExternalProtocol(const GURL& url) {
 
 // static
 bool CefBrowserHostImpl::IsWindowRenderingDisabled(const CefWindowInfo& info) {
-  return info.window_rendering_disabled ? true : false;
+  return info.windowless_rendering_enabled ? true : false;
 }
 
 bool CefBrowserHostImpl::IsTransparent() {
-  return window_info_.transparent_painting != 0;
+  return window_info_.transparent_painting_enabled ? true : false;
 }
 
 void CefBrowserHostImpl::PlatformTranslateKeyEvent(