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

ui/gl/gl_image_stub.h

Index: ui/gl/gl_image_stub.h
diff --git a/ui/gl/gl_image_stub.h b/ui/gl/gl_image_stub.h
index 5f2fdb2fe70dabb8c800050ca8a2eeb9f78bbf8f..9044c4c70c1d524a93f9173e37580d5b2f69dc3b 100644
--- a/ui/gl/gl_image_stub.h
+++ b/ui/gl/gl_image_stub.h
@@ -15,7 +15,7 @@ class GL_EXPORT GLImageStub : public GLImage {
   GLImageStub();
 
   // Overridden from GLImage:
-  virtual void Destroy() OVERRIDE {}
+  virtual void Destroy(bool have_context) OVERRIDE {}
   virtual gfx::Size GetSize() OVERRIDE;
   virtual bool BindTexImage(unsigned target) OVERRIDE;
   virtual void ReleaseTexImage(unsigned target) OVERRIDE {}