Add IPC category to GPU scenario

Follow-up on this CL:
  https://chromium-review.googlesource.com/c/chromium/src/+/1249909

R=piman@chromium.org, oysteine@chromium.org

Bug: 888580
Change-Id: Ia8a6404b7a750f102d224f173abf59c48c5e3b10
Reviewed-on: https://chromium-review.googlesource.com/1251765Reviewed-by: Antoine Labour <piman@chromium.org>
Reviewed-by: oysteine <oysteine@chromium.org>
Commit-Queue: Etienne Bergeron <etienneb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#595205}

content/browser/tracing/background_tracing_manager_impl.cc

@@ -655,7 +655,7 @@ TraceConfig BackgroundTracingManagerImpl::GetConfigForCategoryPreset(
           record_mode);
     case BackgroundTracingConfigImpl::CategoryPreset::BENCHMARK_GPU:
       return TraceConfig(
-          "benchmark,toplevel,gpu,base,mojom,"
+          "benchmark,toplevel,gpu,base,mojom,ipc,"
           "disabled-by-default-system_stats,disabled-by-default-cpu_profiler",
           record_mode);
     case BackgroundTracingConfigImpl::CategoryPreset::BENCHMARK_IPC: