Pass RapporService to content/browser/

chrome/browser/extensions/chrome_extension_web_contents_observer.cc

 // Copyright 2014 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/extensions/chrome_extension_web_contents_observer.h"
 
 #include "base/command_line.h"
 #include "base/metrics/field_trial.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/extensions/error_console/error_console.h"
@@ skipping 204 matching lines @@
       } else {
         // The field trial is not active for this version.
         ChromeMetricsServiceAccessor::RegisterSyntheticFieldTrial(
             "SiteIsolationExtensionsActive", "Default");
       }
     }
 
     if (rappor::RapporService* rappor = g_browser_process->rappor_service()) {
       const std::string& extension_id =
           parent_is_extension ? parent_url.host() : frame_url.host();
-      rappor->RecordSample("Extensions.AffectedByIsolateExtensions",
+      rappor->RecordSampleString("Extensions.AffectedByIsolateExtensions",
                            rappor::UMA_RAPPOR_TYPE, extension_id);
     }
   }
 }
 
 }  // namespace extensions