[WebGL 2] primitive restart should be always enabled

gpu/command_buffer/service/buffer_manager.h

Index: gpu/command_buffer/service/buffer_manager.h
diff --git a/gpu/command_buffer/service/buffer_manager.h b/gpu/command_buffer/service/buffer_manager.h
index 33df818647966ed15770dcbe77aa83e0f05e2e55..a6a944e58df7a5c344e29795a31b7d4c5758897e 100644
--- a/gpu/command_buffer/service/buffer_manager.h
+++ b/gpu/command_buffer/service/buffer_manager.h
@@ -275,6 +275,8 @@ class GPU_EXPORT BufferManager : public base::trace_event::MemoryDumpProvider {
   bool OnMemoryDump(const base::trace_event::MemoryDumpArgs& args,
                     base::trace_event::ProcessMemoryDump* pmd) override;
 
+  void SetPrimitiveRestartState(bool enabled);
+
  private:
   friend class Buffer;
   friend class TestHelper;  // Needs access to DoBufferData.
@@ -326,6 +328,8 @@ class GPU_EXPORT BufferManager : public base::trace_event::MemoryDumpProvider {
   // Allows to check no Buffer will outlive this.
   unsigned int buffer_count_;
 
+  bool primitive_restart_enabled_;
+
   bool have_context_;
   bool use_client_side_arrays_for_stream_buffers_;