command_buffer: Make inactive bound fragment inputs reserve the location

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 <cmath>
@@ skipping 15209 matching lines @@
   }
 
   if ((components != 0 && gen_mode == GL_NONE) ||
       (components == 0 && gen_mode != GL_NONE)) {
     LOCAL_SET_GL_ERROR(GL_INVALID_VALUE, kFunctionName,
                        "components and genMode do not match");
     return error::kNoError;
   }
 
   GLint location = static_cast<GLint>(c.location);
-  if (location == -1) {
+  if (program->IsInactiveFragmentInputLocationByFakeLocation(location))
     return error::kNoError;
-  }
 
   const Program::FragmentInputInfo* fragment_input_info =
       program->GetFragmentInputInfoByFakeLocation(location);
   if (!fragment_input_info) {
     LOCAL_SET_GL_ERROR(GL_INVALID_OPERATION, kFunctionName, "unknown location");
     return error::kNoError;
   }
   GLint real_location = fragment_input_info->location;
 
   const GLfloat* coeffs = NULL;
@@ skipping 50 matching lines @@
   return error::kNoError;
 }
 
 // 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