[ios] Adds OmahaServiceProvider.

ios/public/provider/chrome/browser/test_chrome_browser_provider.h

Index: ios/public/provider/chrome/browser/test_chrome_browser_provider.h
diff --git a/ios/public/provider/chrome/browser/test_chrome_browser_provider.h b/ios/public/provider/chrome/browser/test_chrome_browser_provider.h
index b1fb9b0a2685d91a0b8d9dc78dbb3da716a440c5..cfa4a2d0cc6ba461f27cdd16f3f8b46f46090efe 100644
--- a/ios/public/provider/chrome/browser/test_chrome_browser_provider.h
+++ b/ios/public/provider/chrome/browser/test_chrome_browser_provider.h
@@ -31,10 +31,12 @@ class TestChromeBrowserProvider : public ChromeBrowserProvider {
   NSArray* GetAvailableVoiceSearchLanguages() const override;
   VoiceSearchProvider* GetVoiceSearchProvider() const override;
   AppDistributionProvider* GetAppDistributionProvider() const override;
+  OmahaServiceProvider* GetOmahaServiceProvider() const override;
 
  private:
   std::unique_ptr<AppDistributionProvider> app_distribution_provider_;
   std::unique_ptr<ChromeIdentityService> chrome_identity_service_;
+  std::unique_ptr<OmahaServiceProvider> omaha_service_provider_;
   std::unique_ptr<UpdatableResourceProvider> updatable_resource_provider_;
   std::unique_ptr<VoiceSearchProvider> voice_search_provider_;