Add a gpu driver bug workaround to count in all varyings in packing check.

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 5399 matching lines @@
   LogClientServiceForInfo(program, program_id, "glLinkProgram");
   ShaderTranslator* vertex_translator = NULL;
   ShaderTranslator* fragment_translator = NULL;
   if (use_shader_translator_) {
     vertex_translator = vertex_translator_.get();
     fragment_translator = fragment_translator_.get();
   }
   if (program->Link(shader_manager(),
                     vertex_translator,
                     fragment_translator,
+                    workarounds().count_all_in_varyings_packing ?
+                        Program::kCountAll : Program::kCountOnlyStaticallyUsed,
                     shader_cache_callback_)) {
     if (program == state_.current_program.get()) {
       if (workarounds().use_current_program_after_successful_link)
         glUseProgram(program->service_id());
       if (workarounds().clear_uniforms_before_first_program_use)
         program_manager()->ClearUniforms(program);
     }
   }
 };
 
@@ skipping 5091 matching lines @@
   DoDidUseTexImageIfNeeded(texture, texture->target());
 }
 
 // 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