During image destroy, delete textures only if we have a GL context.

ui/gl/gl_image_io_surface.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.
 
 #ifndef UI_GL_GL_IMAGE_IO_SURFACE_H_
 #define UI_GL_GL_IMAGE_IO_SURFACE_H_
 
 #include "base/mac/scoped_cftyperef.h"
 #include "ui/gl/gl_image.h"
 
 class IOSurfaceSupport;
 
 namespace gfx {
 
 class GL_EXPORT GLImageIOSurface : public GLImage {
  public:
   explicit GLImageIOSurface(gfx::Size size);
 
   bool Initialize(gfx::GpuMemoryBufferHandle buffer);
 
   // Overridden from GLImage:
-  virtual void Destroy() OVERRIDE {}
+  virtual void Destroy(bool have_context) OVERRIDE {}

[reveman, 2014/05/29 16:30:34]

I think this will fail to compile. You need to update the .cc file too. Please
add an implementation of Destroy to the .cc file that calls io_surface_.reset()
and verify that it has been called in the dtor.

   virtual gfx::Size GetSize() OVERRIDE;
   virtual bool BindTexImage(unsigned target) OVERRIDE;
   virtual void ReleaseTexImage(unsigned target) OVERRIDE {}
   virtual void WillUseTexImage() OVERRIDE {}
   virtual void DidUseTexImage() OVERRIDE {}
   virtual void WillModifyTexImage() OVERRIDE {}
   virtual void DidModifyTexImage() OVERRIDE {}
 
  protected:
   virtual ~GLImageIOSurface();
 
  private:
   IOSurfaceSupport* io_surface_support_;
   base::ScopedCFTypeRef<CFTypeRef> io_surface_;
   gfx::Size size_;
 
   DISALLOW_COPY_AND_ASSIGN(GLImageIOSurface);
 };
 
 }  // namespace gfx
 
 #endif  // UI_GL_GL_IMAGE_IO_SURFACE_H_