Detect seek penalties on Linux/ChromeOS.

chrome/browser/metrics/drive_metrics_provider.cc

 // Copyright 2015 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 "chrome/browser/metrics/drive_metrics_provider.h"
 
 #include "base/base_paths.h"
 #include "base/bind.h"
 #include "base/files/file_path.h"
 #include "base/location.h"
@@ skipping 22 matching lines @@
   content::BrowserThread::PostTaskAndReplyWithResult(
       content::BrowserThread::FILE, FROM_HERE,
       base::Bind(&DriveMetricsProvider::GetDriveMetricsOnFileThread),
       base::Bind(&DriveMetricsProvider::GotDriveMetrics,
                  weak_ptr_factory_.GetWeakPtr()));
 }
 
 DriveMetricsProvider::SeekPenaltyResponse::SeekPenaltyResponse()
     : success(false) {}
 
-#if !(defined(OS_WIN) || defined(OS_ANDROID) || defined(OS_IOS))
-// static
-bool DriveMetricsProvider::HasSeekPenalty(const base::FilePath& path,
-                                          bool* has_seek_penalty) {
-  // TODO(dbeam): implement on more platforms.
-  return false;
-}
-#endif
-
 // static
 DriveMetricsProvider::DriveMetrics
 DriveMetricsProvider::GetDriveMetricsOnFileThread() {
   DCHECK_CURRENTLY_ON(content::BrowserThread::FILE);
 
   DriveMetricsProvider::DriveMetrics metrics;
   QuerySeekPenalty(base::FILE_EXE, &metrics.app_drive);
   QuerySeekPenalty(chrome::FILE_LOCAL_STATE, &metrics.user_data_drive);
   return metrics;
 }
@@ skipping 28 matching lines @@
   metrics_ = metrics;
   got_metrics_callback_.Run();
 }
 
 void DriveMetricsProvider::FillDriveMetrics(
     const DriveMetricsProvider::SeekPenaltyResponse& response,
     metrics::SystemProfileProto::Hardware::Drive* drive) {
   if (response.success)
     drive->set_has_seek_penalty(response.has_seek_penalty);
 }