Remove parts of //cc we aren't using

cc/debug/benchmark_instrumentation.cc

-// Copyright 2013 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 "base/trace_event/trace_event.h"
-#include "cc/debug/benchmark_instrumentation.h"
-
-namespace cc {
-namespace benchmark_instrumentation {
-
-// Please do not change the trace events in this file without updating
-// tools/perf/measurements/rendering_stats.py accordingly.
-// The benchmarks search for events and their arguments by name.
-
-void IssueImplThreadRenderingStatsEvent(const RenderingStats& stats) {
-  TRACE_EVENT_INSTANT1("benchmark",
-                       "BenchmarkInstrumentation::ImplThreadRenderingStats",
-                       TRACE_EVENT_SCOPE_THREAD,
-                       "data", stats.AsTraceableData());
-}
-
-void IssueDisplayRenderingStatsEvent() {
-  scoped_refptr<base::trace_event::TracedValue> record_data =
-      new base::trace_event::TracedValue();
-  record_data->SetInteger("frame_count", 1);
-  TRACE_EVENT_INSTANT1(
-      "benchmark",
-      "BenchmarkInstrumentation::DisplayRenderingStats",
-      TRACE_EVENT_SCOPE_THREAD,
-      "data",
-      scoped_refptr<base::trace_event::ConvertableToTraceFormat>(record_data));
-}
-
-}  // namespace benchmark_instrumentation
-}  // namespace cc