[chromedriver] When launching a Chrome App, automatically switch to the new window.

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 3b13b678ad86df0a54001118eb8f5febaac926a7..33325bce12aaf831c41338c201be9e5d6ca05878 100644
--- a/chrome/test/chromedriver/chrome/chrome_desktop_impl.h
+++ b/chrome/test/chromedriver/chrome/chrome_desktop_impl.h
@@ -57,6 +57,10 @@ class ChromeDesktopImpl : public ChromeImpl {
 
   const base::CommandLine& command() const;
 
+  Status WaitForNewAppWindow(const base::TimeDelta& timeout,
+                             const std::string& app_id,
+                             std::string* web_view_id);
+
  private:
   base::Process process_;
   base::CommandLine command_;