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

gpu/command_buffer/service/gles2_cmd_decoder.cc

 // Copyright (c) 2012 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.
 
 #include "gpu/command_buffer/service/gles2_cmd_decoder.h"
 
 #include <stdio.h>
 
 #include <algorithm>
 #include <list>
@@ skipping 3478 matching lines @@
   if (query_manager_.get()) {
     query_manager_->Destroy(have_context);
     query_manager_.reset();
   }
 
   if (vertex_array_manager_ .get()) {
     vertex_array_manager_->Destroy(have_context);
     vertex_array_manager_.reset();
   }
 
+  if (image_manager_.get()) {
+    image_manager_->Destroy(have_context);
+    image_manager_.reset();
+  }
+
   offscreen_target_frame_buffer_.reset();
   offscreen_target_color_texture_.reset();
   offscreen_target_color_render_buffer_.reset();
   offscreen_target_depth_render_buffer_.reset();
   offscreen_target_stencil_render_buffer_.reset();
   offscreen_saved_frame_buffer_.reset();
   offscreen_saved_color_texture_.reset();
   offscreen_resolved_frame_buffer_.reset();
   offscreen_resolved_color_texture_.reset();
 
@@ skipping 7415 matching lines @@
   }
 }
 
 // Include the auto-generated part of this file. We split this because it means
 // we can easily edit the non-auto generated parts right here in this file
 // instead of having to edit some template or the code generator.
 #include "gpu/command_buffer/service/gles2_cmd_decoder_autogen.h"
 
 }  // namespace gles2
 }  // namespace gpu