Point to build requirements page when there is a dependency check failure.

Tools/Scripts/webkitpy/layout_tests/port/base.py

Index: Tools/Scripts/webkitpy/layout_tests/port/base.py
diff --git a/Tools/Scripts/webkitpy/layout_tests/port/base.py b/Tools/Scripts/webkitpy/layout_tests/port/base.py
index ec0853a26c1d22071f62cd8cc45b1aea60684025..e259ed56d73b3f15832604d2398e53ec3bf4def2 100644
--- a/Tools/Scripts/webkitpy/layout_tests/port/base.py
+++ b/Tools/Scripts/webkitpy/layout_tests/port/base.py
@@ -383,6 +383,10 @@ class Port(object):
             _log.error('To override, invoke with --nocheck-sys-deps')
             _log.error('')
             _log.error(output)
+            if sys.platform.startswith('linux'):

[Peter Beverloo, 2014/03/20 15:09:12]

self.host.platform.is_linux()

[mlamouri (slow - plz ping), 2014/03/20 17:21:01]

Done.

+                _log.error('')
+                _log.error('Did you install the dependencies listed here?')

[Peter Beverloo, 2014/03/20 15:09:12]

Please phrase this as a statement instead. To be consistent with Android, use:

"For complete Linux build requirements, please see:"

[mlamouri (slow - plz ping), 2014/03/20 17:21:01]

Done.

+                _log.error('https://code.google.com/p/chromium/wiki/LayoutTestsLinux')
             return test_run_results.SYS_DEPS_EXIT_STATUS
         return test_run_results.OK_EXIT_STATUS