Detect seek penalties on Linux/ChromeOS.

chrome/browser/metrics/drive_metrics_provider_mac.mm

Index: chrome/browser/metrics/drive_metrics_provider_mac.mm
diff --git a/chrome/browser/metrics/drive_metrics_provider_android.cc b/chrome/browser/metrics/drive_metrics_provider_mac.mm
similarity index 89%
copy from chrome/browser/metrics/drive_metrics_provider_android.cc
copy to chrome/browser/metrics/drive_metrics_provider_mac.mm
index beb9e8c773f52ec62009f7fe63581d3953a6a271..ff98485df15b23257a75939ac01e4370e79ad3e6 100644
--- a/chrome/browser/metrics/drive_metrics_provider_android.cc
+++ b/chrome/browser/metrics/drive_metrics_provider_mac.mm
@@ -7,6 +7,6 @@
 // static
 bool DriveMetricsProvider::HasSeekPenalty(const base::FilePath& path,
                                           bool* has_seek_penalty) {
-  *has_seek_penalty = false;
-  return true;
+  // TODO(dbeam): implement.
+  return false;
 }