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 0c65c886ea4dd38974e0f89c2597059f3c4b72bf..5308c552c192045d731cf4c8a380bbadc5c8ece7 100644
--- a/chrome/browser/ui/webui/options/browser_options_handler.h
+++ b/chrome/browser/ui/webui/options/browser_options_handler.h
@@ -327,6 +327,17 @@ class BrowserOptionsHandler
   // Setup the UI for showing which settings are extension controlled.
   void SetupExtensionControlledIndicators();
 
+  // Setup the value and the disabled property for metrics reporting for (except
+  // CrOS and Android).
+  void SetupMetricsReportingCheckbox();
+
+  // Called when the MetricsReportingEnabled checkbox values are changed.
+  // |args| will contain the checkbox checked state as a boolean.
+  void HandleMetricsReportingChange(const base::ListValue* args);
+
+  // Notifies the result of MetricsReportingEnabled change to Javascript layer.
+  void MetricsReportingChangeCallback(bool success);
+
 #if defined(OS_CHROMEOS)
   // Setup the accessibility features for ChromeOS.
   void SetupAccessibilityFeatures();