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

ui/gl/gl_image_shm.h

Index: ui/gl/gl_image_shm.h
diff --git a/ui/gl/gl_image_shm.h b/ui/gl/gl_image_shm.h
index 079bab90d0ad4164e3070d245836ff3944221e35..21e86212efc3365926c7b89b70dc2ec262bc2afe 100644
--- a/ui/gl/gl_image_shm.h
+++ b/ui/gl/gl_image_shm.h
@@ -18,7 +18,7 @@ class GL_EXPORT GLImageShm : public GLImage {
   bool Initialize(gfx::GpuMemoryBufferHandle buffer);
 
   // 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 {}