base/win: Add documentation to RegKey::Read/Write functions.

chrome_frame/crash_reporting/crash_metrics.cc

 // 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.
 
 #include "chrome_frame/crash_reporting/crash_metrics.h"
 
 #include "base/metrics/histogram.h"
 #include "base/win/registry.h"
 #include "chrome_frame/utils.h"
 
@@ skipping 36 matching lines @@
   return false;
 }
 
 int CrashMetricsReporter::GetMetric(Metric metric) {
   DCHECK(metric >= NAVIGATION_COUNT && metric <= LAST_METRIC);
 
   int ret = 0;
   base::win::RegKey metric_key;
   if (metric_key.Open(HKEY_CURRENT_USER, kChromeFrameMetricsKey,
                       KEY_QUERY_VALUE) == ERROR_SUCCESS) {
-    metric_key.ReadValueDW(g_metric_names[metric],
-                           reinterpret_cast<DWORD*>(&ret));
+    metric_key.ReadValue(g_metric_names[metric],
+                         reinterpret_cast<DWORD*>(&ret));
   }
 
   return ret;
 }
 
 int CrashMetricsReporter::IncrementMetric(Metric metric) {
   DCHECK(metric >= NAVIGATION_COUNT && metric <= LAST_METRIC);
   int metric_value = GetMetric(metric);
   metric_value++;
   SetMetric(metric, metric_value);
@@ skipping 19 matching lines @@
     UMA_HISTOGRAM_COUNTS("ChromeFrame.HostCrashCount", crash_count);
     SetMetric(CRASH_COUNT, 0);
   }
 
   int channel_error_count = GetMetric(CHANNEL_ERROR_COUNT);
   if (channel_error_count > 0) {
     UMA_HISTOGRAM_COUNTS("ChromeFrame.ChannelErrorCount", channel_error_count);
     SetMetric(CHANNEL_ERROR_COUNT, 0);
   }
 }