Remove GLImage::Destroy().

ui/gl/gl_image_io_surface.mm

Index: ui/gl/gl_image_io_surface.mm
diff --git a/ui/gl/gl_image_io_surface.mm b/ui/gl/gl_image_io_surface.mm
index 7c7000c439a8c6d68f51b32838b9344024c6000b..e56e4f21d779067f0eff424528d9ab42e765e25b 100644
--- a/ui/gl/gl_image_io_surface.mm
+++ b/ui/gl/gl_image_io_surface.mm
@@ -182,7 +182,6 @@ GLImageIOSurface::GLImageIOSurface(const gfx::Size& size,
 
 GLImageIOSurface::~GLImageIOSurface() {
   DCHECK(thread_checker_.CalledOnValidThread());
-  DCHECK(!io_surface_);
 }
 
 bool GLImageIOSurface::Initialize(IOSurfaceRef io_surface,
@@ -224,12 +223,6 @@ bool GLImageIOSurface::InitializeWithCVPixelBuffer(
   return true;
 }
 
-void GLImageIOSurface::Destroy(bool have_context) {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  io_surface_.reset();
-  cv_pixel_buffer_.reset();
-}
-
 gfx::Size GLImageIOSurface::GetSize() {
   return size_;
 }