libcef: Modifications due to underlying chromium changes.

- Change gfx::WindowHandle to gfx::NativeWindow and gfx::ViewHandle to gfx::NativeView.
- Add proxy support to BrowserWebViewDelegate.
- Add webkit\port\platform\graphics\skia path to libcef_webkit_includes.vsprops due to relocation of PlatformContextSkia.h.

git-svn-id: https://chromiumembedded.googlecode.com/svn/trunk@4 5089003a-bbd8-11dd-ad1f-f1f9622dbc98

libcef/webview_host.h

@@ -21,7 +21,7 @@ class WebViewHost : public WebWidgetHost {
   // The new instance is deleted once the associated ViewHandle is destroyed.
   // The newly created window should be resized after it is created, using the
   // MoveWindow (or equivalent) function.
-  static WebViewHost* Create(gfx::WindowHandle parent_window,
+  static WebViewHost* Create(gfx::NativeWindow parent_window,
                              WebViewDelegate* delegate,
                              const WebPreferences& prefs);