Increase maximum sleep time.

tools/xdisplaycheck/xdisplaycheck.cc

Index: tools/xdisplaycheck/xdisplaycheck.cc
===================================================================
--- tools/xdisplaycheck/xdisplaycheck.cc	(revision 132119)
+++ tools/xdisplaycheck/xdisplaycheck.cc	(working copy)
@@ -3,11 +3,11 @@
 // found in the LICENSE file.
 //
 // This is a small program that tries to connect to the X server.  It
-// continually retries until it connects or 5 seconds pass.  If it fails
-// to connect to the X server after 5 seconds, it returns an error code
-// of -1.
+// continually retries until it connects or 30 seconds pass.  If it fails
+// to connect to the X server or fails to find needed functiona, it returns
+// an error code of -1.
 //
-// This is to help verify that the X server is available before we start
+// This is to help verify that a useful X server is available before we start
 // start running tests on the build bots.
 
 #include <errno.h>
@@ -34,7 +34,7 @@
 }
 
 int main(int argc, char* argv[]) {
-  int kNumTries = 50;  // 49*48/2 * 10 = 12.25s of waiting
+  int kNumTries = 78;  // 78*77/2 * 10 = 30s of waiting
   Display* display = NULL;
   int tries;
   for (tries = 0; tries < kNumTries; ++tries) {