Automate host start up in browser test

chrome/test/remoting/pin_browsertest.cc

Index: chrome/test/remoting/pin_browsertest.cc
diff --git a/chrome/test/remoting/pin_browsertest.cc b/chrome/test/remoting/pin_browsertest.cc
index eac2a3f3d3ffcbcf6c0fc301de193dc3e6d6d941..3ae478b01190d340ac2f28b08760bbe004553502 100644
--- a/chrome/test/remoting/pin_browsertest.cc
+++ b/chrome/test/remoting/pin_browsertest.cc
@@ -29,7 +29,7 @@ IN_PROC_BROWSER_TEST_F(RemoteDesktopBrowserTest, MANUAL_Invalid_PIN) {
   LoadScript(content, FILE_PATH_LITERAL("invalid_pin_browser_test.js"));
 
   RunJavaScriptTest(content, "Invalid_PIN", "{"
-    "pin: '" + me2me_pin() + "'"
+    "pin: '" + me2me_pin() + "ABC'"

[Jamie, 2014/07/22 18:47:11]

This doesn't appear to be related to this CL? Could it be done separately?

[kelvinp, 2014/07/23 22:22:26]

With this change, we will set up the host with the me2me_pin(), if we can try to
connect again with me2me_pin(), it won't be an invalid pin.  Therefore, I append
some random string 'ABC' after the pin to make it invalid. 

   "}");
 
   Cleanup();