Switch to direct use of OwnerSettingsServiceChromeOS::Set() in tests.

chrome/browser/chromeos/settings/stub_cros_settings_provider.h

Index: chrome/browser/chromeos/settings/stub_cros_settings_provider.h
diff --git a/chrome/browser/chromeos/settings/stub_cros_settings_provider.h b/chrome/browser/chromeos/settings/stub_cros_settings_provider.h
index 5fcb65c18f2db8f3a4762c27354b016d35952fbe..a9770d06b6d064765d9d81674fed0589f94bb778 100644
--- a/chrome/browser/chromeos/settings/stub_cros_settings_provider.h
+++ b/chrome/browser/chromeos/settings/stub_cros_settings_provider.h
@@ -24,6 +24,13 @@ class StubCrosSettingsProvider : public CrosSettingsProvider {
   TrustedStatus PrepareTrustedValues(const base::Closure& callback) override;
   bool HandlesSetting(const std::string& path) const override;
 
+  // Convenience forms of Set().  These methods will replace any existing
+  // value at that |path|, even if it has a different type.
+  void SetBoolean(const std::string& path, bool in_value);
+  void SetInteger(const std::string& path, int in_value);
+  void SetDouble(const std::string& path, double in_value);
+  void SetString(const std::string& path, const std::string& in_value);
+
  private:
   // CrosSettingsProvider implementation:
   void DoSet(const std::string& path, const base::Value& value) override;