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..244ff2fe1cc825c3e4b4b0636a0170f7e52c7611 100644
--- a/chrome/browser/chromeos/settings/stub_cros_settings_provider.h
+++ b/chrome/browser/chromeos/settings/stub_cros_settings_provider.h
@@ -24,6 +24,9 @@ class StubCrosSettingsProvider : public CrosSettingsProvider {
   TrustedStatus PrepareTrustedValues(const base::Closure& callback) override;
   bool HandlesSetting(const std::string& path) const override;
 
+  void SetTrustedStatus(TrustedStatus status);
+  void SetCurrentUserIsOwner(bool owner);
+
  private:
   // CrosSettingsProvider implementation:
   void DoSet(const std::string& path, const base::Value& value) override;
@@ -34,6 +37,15 @@ class StubCrosSettingsProvider : public CrosSettingsProvider {
   // In-memory settings storage.
   PrefValueMap values_;
 
+  // By default, every value from Set is written. However, in some cases (e.g.
+  // enterprise-managed) it is required to retain current settings, but notify
+  // about the attempted change. That's what happens when the current user is
+  // not the owner.
+  bool current_user_is_owner_;
+
+  // Default value is TRUSTED.
+  TrustedStatus trusted_status_;
+
   DISALLOW_COPY_AND_ASSIGN(StubCrosSettingsProvider);
 };