Reland of Add a NavigationThrottle to the public content/ interface

chrome/browser/chrome_content_browser_client.h

Index: chrome/browser/chrome_content_browser_client.h
diff --git a/chrome/browser/chrome_content_browser_client.h b/chrome/browser/chrome_content_browser_client.h
index fa4bc9ae53c687e7edb434f0797eb38a5d347c7b..e53cd227b24249249f9677c2c4f4f2fd188c46d8 100644
--- a/chrome/browser/chrome_content_browser_client.h
+++ b/chrome/browser/chrome_content_browser_client.h
@@ -285,6 +285,8 @@ class ChromeContentBrowserClient : public content::ContentBrowserClient {
       content::WebContents* web_contents) override;
 
   void RecordURLMetric(const std::string& metric, const GURL& url) override;
+  ScopedVector<content::NavigationThrottle> CreateThrottlesForNavigation(
+      content::NavigationHandle* handle) override;
 
  private:
   friend class DisableWebRtcEncryptionFlagTest;