Add the ability for DevTools to wrap network transactions.

content/public/browser/content_browser_client.h

Index: content/public/browser/content_browser_client.h
diff --git a/content/public/browser/content_browser_client.h b/content/public/browser/content_browser_client.h
index 18c837b50db12e944a9d54e6e7c92e089480731a..d2a576e7c2e72e3b9ef69c417bf7a8f6180d0b34 100644
--- a/content/public/browser/content_browser_client.h
+++ b/content/public/browser/content_browser_client.h
@@ -532,6 +532,12 @@ class CONTENT_EXPORT ContentBrowserClient {
   // Clears browser cookies.
   virtual void ClearCookies(RenderViewHost* rvh) {}
 
+  // Sets blocked domains.
+  virtual void SetBlockedDomains(
+      RenderViewHost* rvh,
+      const std::string& id,
+      const std::vector<std::string>& blocked_domains) {}
+
   // Returns the default download directory.
   // This can be called on any thread.
   virtual base::FilePath GetDefaultDownloadDirectory();