metrics: log whether drives have seek penalties (and whether this was determined successfully).

chrome/browser/metrics/drive_metrics_provider.cc

Index: chrome/browser/metrics/drive_metrics_provider.cc
diff --git a/chrome/browser/metrics/drive_metrics_provider.cc b/chrome/browser/metrics/drive_metrics_provider.cc
index f2e2ac51cdcae22e8985d81d93fcb14ed2f6759d..50c6270e6f4bb1fc2f9c420f18b631cf82bc1829 100644
--- a/chrome/browser/metrics/drive_metrics_provider.cc
+++ b/chrome/browser/metrics/drive_metrics_provider.cc
@@ -9,8 +9,10 @@
 #include "base/files/file_path.h"
 #include "base/location.h"
 #include "base/logging.h"
+#include "base/metrics/histogram_macros.h"
 #include "base/path_service.h"
 #include "base/sys_info.h"
+#include "base/time/time.h"
 #include "chrome/common/chrome_paths.h"
 #include "content/public/browser/browser_thread.h"
 
@@ -60,8 +62,19 @@ void DriveMetricsProvider::QuerySeekPenalty(
   if (!PathService::Get(path_service_key, &path))
     return;
 
+  base::TimeTicks start = base::TimeTicks::Now();
+
   response->success =
       base::SysInfo::HasSeekPenalty(path, &response->has_seek_penalty);
+
+  UMA_HISTOGRAM_TIMES("Hardware.Drive.HasSeekPenalty_Time",
+                      base::TimeTicks::Now() - start);
+  UMA_HISTOGRAM_BOOLEAN("Hardware.Drive.HasSeekPenalty_Success",
+                        response->success);
+  if (response->success) {
+    UMA_HISTOGRAM_BOOLEAN("Hardware.Drive.HasSeekPenalty",
+                          response->has_seek_penalty);
+  }
 }
 
 void DriveMetricsProvider::GotDriveMetrics(