Update from chromium https://crrev.com/302282

ui/gl/gl_surface_x11.cc

Index: ui/gl/gl_surface_x11.cc
diff --git a/ui/gl/gl_surface_x11.cc b/ui/gl/gl_surface_x11.cc
index 55a0f38e73f6f601f3fdb1116bf0dc5c649eaa9a..895eb937a385bdb7763ec91fa77a5927d7c654d9 100644
--- a/ui/gl/gl_surface_x11.cc
+++ b/ui/gl/gl_surface_x11.cc
@@ -28,16 +28,16 @@ class NativeViewGLSurfaceOSMesa : public GLSurfaceOSMesa {
   static bool InitializeOneOff();
 
   // Implement a subset of GLSurface.
-  virtual bool Initialize() override;
-  virtual void Destroy() override;
-  virtual bool Resize(const gfx::Size& new_size) override;
-  virtual bool IsOffscreen() override;
-  virtual bool SwapBuffers() override;
-  virtual bool SupportsPostSubBuffer() override;
-  virtual bool PostSubBuffer(int x, int y, int width, int height) override;
+  bool Initialize() override;
+  void Destroy() override;
+  bool Resize(const gfx::Size& new_size) override;
+  bool IsOffscreen() override;
+  bool SwapBuffers() override;
+  bool SupportsPostSubBuffer() override;
+  bool PostSubBuffer(int x, int y, int width, int height) override;
 
  protected:
-  virtual ~NativeViewGLSurfaceOSMesa();
+  ~NativeViewGLSurfaceOSMesa() override;
 
  private:
   Display* xdisplay_;