Allow AudioRendererMixerInputs to be restarted after stopped.

media/base/audio_renderer_mixer_unittest.cc

 // Copyright (c) 2012 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.
 
 // MSVC++ requires this to be set before any other includes to get M_PI.
 #define _USE_MATH_DEFINES
 #include <cmath>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 378 matching lines @@
   }
 
   mixer_callback_->OnRenderError();
   for (size_t i = 0; i < mixer_inputs_.size(); ++i)
     mixer_inputs_[i]->Stop();
 }
 
 TEST_P(AudioRendererMixerBehavioralTest, OnRenderErrorPausedInput) {
   InitializeInputs(kMixerInputs);
 
-  for (size_t i = 0; i < mixer_inputs_.size(); ++i)
+  for (size_t i = 0; i < mixer_inputs_.size(); ++i) {
+    mixer_inputs_[i]->Start();
     EXPECT_CALL(*fake_callbacks_[i], OnRenderError()).Times(1);
+  }
 
   // Fire the error before attaching any inputs.  Ensure an error is recieved
   // even if the input is not connected.
   mixer_callback_->OnRenderError();
 
   for (size_t i = 0; i < mixer_inputs_.size(); ++i)
     mixer_inputs_[i]->Stop();
 }
 
 // Ensure constructing an AudioRendererMixerInput, but not initializing it does
@@ skipping 61 matching lines @@
 
 // Test cases for behavior which is independent of parameters.  Values() doesn't
 // support single item lists and we don't want these test cases to run for every
 // parameter set.
 INSTANTIATE_TEST_CASE_P(
     AudioRendererMixerBehavioralTest, AudioRendererMixerBehavioralTest,
     testing::ValuesIn(std::vector<AudioRendererMixerTestData>(
         1, std::tr1::make_tuple(44100, 44100, 0))));
 
 }  // namespace media