Introduce IOSChromeMetricsServicesManagerClient

ios/public/provider/chrome/browser/chrome_browser_provider.cc

Index: ios/public/provider/chrome/browser/chrome_browser_provider.cc
diff --git a/ios/public/provider/chrome/browser/chrome_browser_provider.cc b/ios/public/provider/chrome/browser/chrome_browser_provider.cc
index 49b917af706f3e518b8b91a0b4ec5ace6358a568..f08e0f5c9821e928e6ec85aecb57bef3a5d78da5 100644
--- a/ios/public/provider/chrome/browser/chrome_browser_provider.cc
+++ b/ios/public/provider/chrome/browser/chrome_browser_provider.cc
@@ -127,4 +127,12 @@ void ChromeBrowserProvider::GetFaviconForURL(
     const std::vector<int>& desired_sizes_in_pixel,
     const favicon_base::FaviconResultsCallback& callback) const {}
 
+
+bool ChromeBrowserProvider::IsSafeBrowsingEnabled(
+    const base::Closure& on_update_callback) {
+  return false;
+}
+
+void ChromeBrowserProvider::OnMetricsServicesManagerClientDestroyed() {}
+
 }  // namespace ios