Add driver bug workaround for SH_INIT_GL_POSITION.

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 2491 matching lines @@
 #if !defined(ANGLE_SH_VERSION) || ANGLE_SH_VERSION < 108
     resources.HashFunction = &CityHashForAngle;
 #else
     resources.HashFunction = &CityHash64;
 #endif
   else
     resources.HashFunction = NULL;
   ShaderTranslatorInterface::GlslImplementationType implementation_type =
       gfx::GetGLImplementation() == gfx::kGLImplementationEGLGLES2 ?
           ShaderTranslatorInterface::kGlslES : ShaderTranslatorInterface::kGlsl;
-  ShaderTranslatorInterface::GlslBuiltInFunctionBehavior function_behavior =
-      workarounds().needs_glsl_built_in_function_emulation ?
-          ShaderTranslatorInterface::kGlslBuiltInFunctionEmulated :
-          ShaderTranslatorInterface::kGlslBuiltInFunctionOriginal;
+  int driver_bug_workarounds = 0;
+  if (workarounds().needs_glsl_built_in_function_emulation)
+    driver_bug_workarounds |= SH_EMULATE_BUILT_IN_FUNCTIONS;
+  if (workarounds().init_gl_position_in_vertex_shader)
+    driver_bug_workarounds |= SH_INIT_GL_POSITION;
 
   ShaderTranslatorCache* cache = ShaderTranslatorCache::GetInstance();
   vertex_translator_ = cache->GetTranslator(
       SH_VERTEX_SHADER, shader_spec, &resources,
-      implementation_type, function_behavior);
+      implementation_type, driver_bug_workarounds);
   if (!vertex_translator_.get()) {
     LOG(ERROR) << "Could not initialize vertex shader translator.";
     Destroy(true);
     return false;
   }
 
   fragment_translator_ = cache->GetTranslator(
       SH_FRAGMENT_SHADER, shader_spec, &resources,
-      implementation_type, function_behavior);
+      implementation_type, driver_bug_workarounds);
   if (!fragment_translator_.get()) {
     LOG(ERROR) << "Could not initialize fragment shader translator.";
     Destroy(true);
     return false;
   }
   return true;
 }
 
 bool GLES2DecoderImpl::GenBuffersHelper(GLsizei n, const GLuint* client_ids) {
   for (GLsizei ii = 0; ii < n; ++ii) {
@@ skipping 7724 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