Remove the unused sampling profiler.

base/win/sampling_profiler.h

-// Copyright (c) 2011 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 BASE_WIN_SAMPLING_PROFILER_H_
-#define BASE_WIN_SAMPLING_PROFILER_H_
-
-#include <vector>
-
-#include "base/basictypes.h"
-#include "base/time/time.h"
-#include "base/win/scoped_handle.h"
-
-namespace base {
-namespace win {
-
-// This class exposes the functionality of Window's built-in sampling profiler.
-// Each profiler instance covers a range of memory, and while the profiler is
-// running, its buckets will count the number of times the instruction counter
-// lands in the associated range of memory on a sample.
-// The sampling interval is settable, but the setting is system-wide.
-class BASE_EXPORT SamplingProfiler {
- public:
-  // Create an uninitialized sampling profiler.
-  SamplingProfiler();
-  ~SamplingProfiler();
-
-  // Initializes the profiler to cover the memory range |start| through
-  // |start| + |size|, in the process |process_handle| with bucket size
-  // |2^log2_bucket_size|, |log2_bucket_size| must be in the range 2-31,
-  // for bucket sizes of 4 bytes to 2 gigabytes.
-  // The process handle must grant at least PROCESS_QUERY_INFORMATION.
-  // The memory range should be exectuable code, like e.g. the text segment
-  // of an exectuable (whether DLL or EXE).
-  // Returns true on success.
-  bool Initialize(HANDLE process_handle,
-                  void* start,
-                  size_t size,
-                  size_t log2_bucket_size);
-
-  // Start this profiler, which must be initialized and not started.
-  bool Start();
-  // Stop this profiler, which must be started.
-  bool Stop();
-
-  // Get and set the sampling interval.
-  // Note that this is a system-wide setting.
-  static bool SetSamplingInterval(base::TimeDelta sampling_interval);
-  static bool GetSamplingInterval(base::TimeDelta* sampling_interval);
-
-  // Accessors.
-  bool is_started() const { return is_started_; }
-
-  // It is safe to read the counts in the sampling buckets at any time.
-  // Note however that there's no guarantee that you'll read consistent counts
-  // until the profiler has been stopped, as the counts may be updating on other
-  // CPU cores.
-  const std::vector<ULONG>& buckets() const { return buckets_; }
-
- private:
-  // Handle to the corresponding kernel object.
-  ScopedHandle profile_handle_;
-  // True iff this profiler is started.
-  bool is_started_;
-  std::vector<ULONG> buckets_;
-
-  DISALLOW_COPY_AND_ASSIGN(SamplingProfiler);
-};
-
-}  // namespace win
-}  // namespace base
-
-#endif  // BASE_WIN_SAMPLING_PROFILER_H_