[Merge M54] aw: Fix FBO restore in webview functor

android_webview/browser/scoped_app_gl_state_restore.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <memory>
 #include <vector>
 
 #include "base/macros.h"
 
 namespace gl {
@@ skipping 26 matching lines @@
 };
 
 // This class is not thread safe and should only be used on the UI thread.
 class ScopedAppGLStateRestore {
  public:
   enum CallMode {
     MODE_DRAW,
     MODE_RESOURCE_MANAGEMENT,
   };
 
+  static ScopedAppGLStateRestore* Current();
+
   explicit ScopedAppGLStateRestore(CallMode mode);
   ~ScopedAppGLStateRestore();
 
   StencilState stencil_state() const;
   int framebuffer_binding_ext() const;
 
  private:
   std::unique_ptr<internal::ScopedAppGLStateRestoreImpl> impl_;
 
   DISALLOW_COPY_AND_ASSIGN(ScopedAppGLStateRestore);
 };
 
 }  // namespace android_webview