Handle GLES2::ConsumeTextureCHROMIUM consuming the currently bound texture.

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 <limits.h>
 #include <stddef.h>
 #include <stdint.h>
 #include <stdio.h>
@@ skipping 17265 matching lines @@
         "glConsumeTextureCHROMIUM", "invalid mailbox name");
     return;
   }
   if (texture->target() != target) {
     LOCAL_SET_GL_ERROR(
         GL_INVALID_OPERATION,
         "glConsumeTextureCHROMIUM", "invalid target");
     return;
   }
 
+  if (texture_ref->texture() == texture)
+    return;
+
   DeleteTexturesHelper(1, &client_id);
   texture_ref = texture_manager()->Consume(client_id, texture);
   glBindTexture(target, texture_ref->service_id());
 
   TextureUnit& unit = state_.texture_units[state_.active_texture_unit];
   unit.bind_target = target;
   unit.SetInfoForTarget(target, texture_ref);
 }
 
 void GLES2DecoderImpl::EnsureTextureForClientId(
@@ skipping 1955 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 "base/macros.h"
 #include "gpu/command_buffer/service/gles2_cmd_decoder_autogen.h"
 
 }  // namespace gles2
 }  // namespace gpu