Add driver bug workaround for SH_INIT_GL_POSITION.

gpu/command_buffer/service/shader_translator.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/shader_translator.h"
 
 #include <string.h>
 #include <algorithm>
 
 #include "base/at_exit.h"
@@ skipping 100 matching lines @@
 
 ShaderTranslator::DestructionObserver::DestructionObserver() {
 }
 
 ShaderTranslator::DestructionObserver::~DestructionObserver() {
 }
 
 ShaderTranslator::ShaderTranslator()
     : compiler_(NULL),
       implementation_is_glsl_es_(false),
-      needs_built_in_function_emulation_(false) {
+      driver_bug_workarounds_(0) {
 }
 
 bool ShaderTranslator::Init(
     ShShaderType shader_type,
     ShShaderSpec shader_spec,
     const ShBuiltInResources* resources,
     ShaderTranslatorInterface::GlslImplementationType glsl_implementation_type,
-    ShaderTranslatorInterface::GlslBuiltInFunctionBehavior
-        glsl_built_in_function_behavior) {
+    int driver_bug_workarounds) {
   // Make sure Init is called only once.
   DCHECK(compiler_ == NULL);
   DCHECK(shader_type == SH_FRAGMENT_SHADER || shader_type == SH_VERTEX_SHADER);
   DCHECK(shader_spec == SH_GLES2_SPEC || shader_spec == SH_WEBGL_SPEC);
   DCHECK(resources != NULL);
 
   if (!InitializeShaderTranslator())
     return false;
 
   ShShaderOutput shader_output =
       (glsl_implementation_type == kGlslES ? SH_ESSL_OUTPUT : SH_GLSL_OUTPUT);
 
   {
     TRACE_EVENT0("gpu", "ShConstructCompiler");
     compiler_ = ShConstructCompiler(
         shader_type, shader_spec, shader_output, resources);
   }
   compiler_options_ = *resources;
   implementation_is_glsl_es_ = (glsl_implementation_type == kGlslES);
-  needs_built_in_function_emulation_ =
-      (glsl_built_in_function_behavior == kGlslBuiltInFunctionEmulated);
+  driver_bug_workarounds_ = driver_bug_workarounds;
   return compiler_ != NULL;
 }
 
 int ShaderTranslator::GetCompileOptions() const {
   int compile_options =
       SH_OBJECT_CODE | SH_VARIABLES |
       SH_MAP_LONG_VARIABLE_NAMES | SH_ENFORCE_PACKING_RESTRICTIONS |
       SH_LIMIT_EXPRESSION_COMPLEXITY | SH_LIMIT_CALL_STACK_DEPTH;
 
   compile_options |= SH_CLAMP_INDIRECT_ARRAY_BOUNDS;
 
-  if (needs_built_in_function_emulation_)
-    compile_options |= SH_EMULATE_BUILT_IN_FUNCTIONS;
+  compile_options |= driver_bug_workarounds_;
 
   return compile_options;
 }
 
 bool ShaderTranslator::Translate(const char* shader) {
   // Make sure this instance is initialized.
   DCHECK(compiler_ != NULL);
   DCHECK(shader != NULL);
   ClearResults();
 
@@ skipping 139 matching lines @@
   info_log_.reset();
   attrib_map_.clear();
   uniform_map_.clear();
   varying_map_.clear();
   name_map_.clear();
 }
 
 }  // namespace gles2
 }  // namespace gpu