Provision to start base::SimpleTestTickClock at initial ticks

content/renderer/media/render_media_client_unittest.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <string>
 #include <vector>
 
 #include "base/test/simple_test_tick_clock.h"
 #include "content/public/renderer/content_renderer_client.h"
 #include "content/renderer/media/render_media_client.h"
@@ skipping 107 matching lines @@
   EXPECT_TRUE(widevine_uma_name.empty());
 #endif
 
   EXPECT_TRUE(clearkey_uma_name.empty()) << "Clear Key is added by media/ and "
                                             "should not be added by the "
                                             "MediaClient.";
   ;
 }
 
 TEST_F(RenderMediaClientTest, IsKeySystemsUpdateNeeded) {
-  base::SimpleTestTickClock* tick_clock = new base::SimpleTestTickClock();
+  base::SimpleTestTickClock* tick_clock =
+      new base::SimpleTestTickClock(base::TimeTicks());
   render_media_client_->SetTickClockForTesting(
       scoped_ptr<base::TickClock>(tick_clock));
 
   // IsKeySystemsUpdateNeeded() always returns true after construction.
   EXPECT_TRUE(render_media_client_->IsKeySystemsUpdateNeeded());
 
   std::vector<media::KeySystemInfo> key_systems_info;
   render_media_client_->AddSupportedKeySystems(&key_systems_info);
 
   // No update needed immediately after AddSupportedKeySystems() call.
@@ skipping 18 matching lines @@
 
   EXPECT_FALSE(render_media_client_->IsKeySystemsUpdateNeeded());
   tick_clock->Advance(base::TimeDelta::FromMilliseconds(1000));
   EXPECT_FALSE(render_media_client_->IsKeySystemsUpdateNeeded());
   tick_clock->Advance(base::TimeDelta::FromMilliseconds(1000));
   EXPECT_FALSE(render_media_client_->IsKeySystemsUpdateNeeded());
 #endif
 }
 
 }  // namespace content