Add a method to override the network conditions of the ChromeDriver session.

chrome/test/chromedriver/chrome/chrome_desktop_impl.h

Index: chrome/test/chromedriver/chrome/chrome_desktop_impl.h
diff --git a/chrome/test/chromedriver/chrome/chrome_desktop_impl.h b/chrome/test/chromedriver/chrome/chrome_desktop_impl.h
index 9b121186480604de597edd4079b96d62e6ffb8b3..b46d96356939e08e542bb6898f5c3aef732b074e 100644
--- a/chrome/test/chromedriver/chrome/chrome_desktop_impl.h
+++ b/chrome/test/chromedriver/chrome/chrome_desktop_impl.h
@@ -57,11 +57,15 @@ class ChromeDesktopImpl : public ChromeImpl {
 
   const base::CommandLine& command() const;
 
+  int GetNetworkConnection() const;
+  void SetNetworkConnection(int network_connection);
+
  private:
   base::Process process_;
   base::CommandLine command_;
   base::ScopedTempDir user_data_dir_;
   base::ScopedTempDir extension_dir_;
+  int network_connection_;
 
   // Lazily initialized, may be null.
   std::unique_ptr<AutomationExtension> automation_extension_;