Provision to start base::SimpleTestTickClock at initial ticks

media/cast/sender/audio_encoder_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 <stddef.h>
 #include <stdint.h>
 
 #include <sstream>
 #include <string>
 
@@ skipping 85 matching lines @@
     return out.str();
   }
 };
 
 }  // namespace
 
 class AudioEncoderTest : public ::testing::TestWithParam<TestScenario> {
  public:
   AudioEncoderTest() {
     InitializeMediaLibrary();
-    testing_clock_ = new base::SimpleTestTickClock();
-    testing_clock_->Advance(base::TimeTicks::Now() - base::TimeTicks());
+    testing_clock_ = new base::SimpleTestTickClock(base::TimeTicks::Now());
   }
 
   void SetUp() final {
     task_runner_ = new test::FakeSingleThreadTaskRunner(testing_clock_);
     cast_environment_ =
         new CastEnvironment(scoped_ptr<base::TickClock>(testing_clock_),
                             task_runner_, task_runner_, task_runner_);
   }
 
   virtual ~AudioEncoderTest() {}
@@ skipping 127 matching lines @@
         TestScenario(kManyCalls_Mixed2, arraysize(kManyCalls_Mixed2)),
         TestScenario(kManyCalls_Mixed3, arraysize(kManyCalls_Mixed3)),
         TestScenario(kManyCalls_Mixed4, arraysize(kManyCalls_Mixed4)),
         TestScenario(kManyCalls_Mixed5, arraysize(kManyCalls_Mixed5)),
         TestScenario(kOneBigUnderrun, arraysize(kOneBigUnderrun)),
         TestScenario(kTwoBigUnderruns, arraysize(kTwoBigUnderruns)),
         TestScenario(kMixedUnderruns, arraysize(kMixedUnderruns))));
 
 }  // namespace cast
 }  // namespace media