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

ui/gl/gl_image_android_native_buffer.h

 // Copyright 2014 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_ANDROID_NATIVE_BUFFER_H_
 #define UI_GL_GL_IMAGE_ANDROID_NATIVE_BUFFER_H_
 
 #include "ui/gl/gl_image_egl.h"
 
 namespace gfx {
 
 class GL_EXPORT GLImageAndroidNativeBuffer : public GLImageEGL {
  public:
   explicit GLImageAndroidNativeBuffer(const gfx::Size& size);
 
   bool Initialize(EGLClientBuffer native_buffer);
 
   // Overridden from GLImage:
-  virtual void Destroy() OVERRIDE;
+  virtual void Destroy(bool have_context) OVERRIDE;
   virtual bool BindTexImage(unsigned target) OVERRIDE;
   virtual void WillUseTexImage() OVERRIDE;
   virtual void DidUseTexImage() OVERRIDE;
   virtual void SetReleaseAfterUse() OVERRIDE;
 
  protected:
   virtual ~GLImageAndroidNativeBuffer();
 
  private:
   bool release_after_use_;
   bool in_use_;
   unsigned target_;
   EGLImageKHR egl_image_for_unbind_;
   GLuint texture_id_for_unbind_;
 
   DISALLOW_COPY_AND_ASSIGN(GLImageAndroidNativeBuffer);
 };
 
 }  // namespace gfx
 
 #endif  // UI_GL_GL_IMAGE_ANDROID_NATIVE_BUFFER_H_