Change default behavior of --seed to be unix timestamp

third_party/WebKit/Tools/Scripts/webkitpy/common/system/systemhost_mock.py

Index: third_party/WebKit/Tools/Scripts/webkitpy/common/system/systemhost_mock.py
diff --git a/third_party/WebKit/Tools/Scripts/webkitpy/common/system/systemhost_mock.py b/third_party/WebKit/Tools/Scripts/webkitpy/common/system/systemhost_mock.py
index 6457872977577ddc32e51d801af641d0dc7ba2df..f72fb5417406feaa0917a3a758a67792c71ba25b 100644
--- a/third_party/WebKit/Tools/Scripts/webkitpy/common/system/systemhost_mock.py
+++ b/third_party/WebKit/Tools/Scripts/webkitpy/common/system/systemhost_mock.py
@@ -37,7 +37,7 @@ from webkitpy.common.system.workspace_mock import MockWorkspace
 
 class MockSystemHost(object):
 
-    def __init__(self, log_executive=False, executive_throws_when_run=None,
+    def __init__(self, time_return_val=123, log_executive=False, executive_throws_when_run=None,

[Dirk Pranke, 2016/10/28 14:37:22]

Move time_return_val to the end.

                  os_name=None, os_version=None, executive=None, filesystem=None):
         self.executable = 'python'
         self.executive = executive or MockExecutive(should_log=log_executive, should_throw_when_run=executive_throws_when_run)
@@ -59,6 +59,10 @@ class MockSystemHost(object):
             'MOCK_ENVIRON_COPY': '1',
             'PATH': '/bin:/mock/bin'
         }
+        self.time_return_val = time_return_val
+
+    def unixtime(self):
+        return self.time_return_val
 
     def print_(self, *args, **kwargs):
         sep = kwargs.get('sep', ' ')