Consolidates accessing and setting the UMA pref to be within metrics code

chrome/browser/ui/webui/options/browser_options_handler.h

Index: chrome/browser/ui/webui/options/browser_options_handler.h
diff --git a/chrome/browser/ui/webui/options/browser_options_handler.h b/chrome/browser/ui/webui/options/browser_options_handler.h
index 033a51b16756b13732a34a78e33a3cd588126661..efefe5a9c14fd7fb275cc2aaeedbce727d921d61 100644
--- a/chrome/browser/ui/webui/options/browser_options_handler.h
+++ b/chrome/browser/ui/webui/options/browser_options_handler.h
@@ -325,6 +325,9 @@ class BrowserOptionsHandler
   // Setup the UI for showing which settings are extension controlled.
   void SetupExtensionControlledIndicators();
 
+  // Setup the value and the disabled property for metrics reporting.
+  void SetupMetricsReportingCheckbox();
+
 #if defined(OS_CHROMEOS)
   // Setup the accessibility features for ChromeOS.
   void SetupAccessibilityFeatures();