Don't enable occlusion query on Linux with Intel drivers.

gpu/command_buffer/service/context_group.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/context_group.h"
 
 #include <string>
 
 #include "base/command_line.h"
 #include "base/string_util.h"
@@ skipping 145 matching lines @@
       &max_cube_map_texture_size)) {
     LOG(ERROR) << "ContextGroup::Initialize failed because maximum texture size"
                << "is too small.";
     return false;
   }
 
   // Limit Intel on Mac to 512.
   // TODO(gman): Update this code to check for a specific version of
   // the drivers above which we no longer need this fix.
 #if defined(OS_MACOSX)
-  const char* vendor_str = reinterpret_cast<const char*>(
-      glGetString(GL_VENDOR));
-  if (vendor_str) {
-    std::string lc_str(::StringToLowerASCII(std::string(vendor_str)));
-    bool intel_on_mac = strstr(lc_str.c_str(), "intel");
-    if (intel_on_mac) {
-      max_texture_size = std::min(
+  if (feature_info_->feature_flags().is_intel) {
+    max_texture_size = std::min(
         static_cast<GLint>(4096), max_texture_size);
-      max_cube_map_texture_size = std::min(
+    max_cube_map_texture_size = std::min(
         static_cast<GLint>(512), max_cube_map_texture_size);
-    }
   }
 #endif
   texture_manager_.reset(new TextureManager(feature_info_.get(),
                                             max_texture_size,
                                             max_cube_map_texture_size));
 
   const GLint kMinTextureImageUnits = 8;
   const GLint kMinVertexTextureImageUnits = 0;
   if (!QueryGLFeatureU(
       GL_MAX_TEXTURE_IMAGE_UNITS, kMinTextureImageUnits,
@@ skipping 86 matching lines @@
   if (namespace_id >= arraysize(id_namespaces_))
     return NULL;
 
   return id_namespaces_[namespace_id].get();
 }
 
 }  // namespace gles2
 }  // namespace gpu