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

gpu/command_buffer/service/gles2_cmd_decoder.cc

Index: gpu/command_buffer/service/gles2_cmd_decoder.cc
diff --git a/gpu/command_buffer/service/gles2_cmd_decoder.cc b/gpu/command_buffer/service/gles2_cmd_decoder.cc
index 33d35d753f35c3a33d159680bdb7f541d0ebb0dc..8a5248680bab82a964c284a205b5020c423bb550 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder.cc
+++ b/gpu/command_buffer/service/gles2_cmd_decoder.cc
@@ -2236,12 +2236,10 @@ bool GLES2DecoderImpl::Initialize(
 
   if (!disable_workarounds_) {
 #if defined(OS_MACOSX)
-    const char* vendor_str = reinterpret_cast<const char*>(
-        glGetString(GL_VENDOR));
     needs_mac_nvidia_driver_workaround_ =
-        vendor_str && strstr(vendor_str, "NVIDIA");
+        feature_info_->feature_flags().is_nvidia;
     needs_glsl_built_in_function_emulation_ =
-        vendor_str && (strstr(vendor_str, "ATI") || strstr(vendor_str, "AMD"));
+        feature_info_->feature_flags().is_amd;
 #endif
   }