Remove parts of //cc we aren't using

cc/debug/benchmark_instrumentation.h

-// 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.
-
-#ifndef CC_DEBUG_BENCHMARK_INSTRUMENTATION_H_
-#define CC_DEBUG_BENCHMARK_INSTRUMENTATION_H_
-
-#include "cc/base/cc_export.h"
-#include "cc/debug/rendering_stats.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.
-
-namespace internal {
-const char kCategory[] = "cc,benchmark";
-const char kBeginFrameId[] = "begin_frame_id";
-}  // namespace internal
-
-const char kSendBeginFrame[] = "ThreadProxy::ScheduledActionSendBeginMainFrame";
-const char kDoBeginFrame[] = "ThreadProxy::BeginMainFrame";
-
-class ScopedBeginFrameTask {
- public:
-  ScopedBeginFrameTask(const char* event_name, unsigned int begin_frame_id)
-      : event_name_(event_name) {
-    TRACE_EVENT_BEGIN1(internal::kCategory,
-                       event_name_,
-                       internal::kBeginFrameId,
-                       begin_frame_id);
-  }
-  ~ScopedBeginFrameTask() {
-    TRACE_EVENT_END0(internal::kCategory, event_name_);
-  }
-
- private:
-  const char* event_name_;
-
-  DISALLOW_COPY_AND_ASSIGN(ScopedBeginFrameTask);
-};
-
-void IssueImplThreadRenderingStatsEvent(const RenderingStats& stats);
-void CC_EXPORT IssueDisplayRenderingStatsEvent();
-
-}  // namespace benchmark_instrumentation
-}  // namespace cc
-
-#endif  // CC_DEBUG_BENCHMARK_INSTRUMENTATION_H_