Convert base::Bind in chrome/browser/data_reduction_proxy/

This is a code health CL, no behavior change is expected.

Bug: 1007635
Change-Id: I4a928fc753824bb4cb701cf8a055134e8776e86f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2275901
Commit-Queue: Xida Chen <xidachen@chromium.org>
Commit-Queue: Michael Crouse <mcrouse@chromium.org>
Auto-Submit: Xida Chen <xidachen@chromium.org>
Reviewed-by: Michael Crouse <mcrouse@chromium.org>
Cr-Commit-Position: refs/heads/master@{#784182}

chrome/browser/data_reduction_proxy/data_reduction_proxy_chrome_settings.cc

@@ -234,7 +234,7 @@ void DataReductionProxyChromeSettings::InitDataReductionProxySettings(
       InitDataReductionProxySettings(profile_prefs, std::move(service));
 
   data_reduction_proxy::DataReductionProxySettings::
-      SetCallbackToRegisterSyntheticFieldTrial(base::Bind(
+      SetCallbackToRegisterSyntheticFieldTrial(base::BindRepeating(
           &ChromeMetricsServiceAccessor::RegisterSyntheticFieldTrial));
   // In M35 and earlier, the Data Reduction Proxy enabled/disabled setting was
   // stored in prefs, so this setting needs to be migrated to the new way of