Group commandline settings in UI test and in process browser test.

chrome/test/in_process_browser_test.h

Index: chrome/test/in_process_browser_test.h
===================================================================
--- chrome/test/in_process_browser_test.h	(revision 66188)
+++ chrome/test/in_process_browser_test.h	(working copy)
@@ -149,6 +149,10 @@
   // Quits all open browsers and waits until there are no more browsers.
   void QuitBrowsers();
 
+  // Prepare command line that will be used to launch the child browser process
+  // with an in-process test.
+  void PrepareTestCommandLine(CommandLine* command_line);
+
   // Browser created from CreateBrowser.
   Browser* browser_;