Chromecast: adds class to help record complex histograms.

chromecast/media/cma/test/run_all_unittests.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 "base/bind.h"
 #include "base/test/launcher/unit_test_launcher.h"
 #include "base/test/test_suite.h"
 #include "build/build_config.h"
+#include "chromecast/base/metrics/cast_metrics_test_helper.h"
 #include "media/base/media.h"
 
 #if defined(OS_ANDROID)
 #error "CMA not supported on Android"
 #endif
 
 class CmaTestSuite : public base::TestSuite {
  public:
   // Note: the base class constructor creates an AtExitManager.
   CmaTestSuite(int argc, char** argv) : TestSuite(argc, argv) {}
   virtual ~CmaTestSuite() {}
 
  protected:
   virtual void Initialize() override;
 };
 
 void CmaTestSuite::Initialize() {
   // Run TestSuite::Initialize first so that logging is initialized.
   base::TestSuite::Initialize();
 
+  // Some of the chromecast media unit tests require a metrics helper instance.
+  // Provide a fake one.
+  chromecast::metrics::InitializeMetricsHelperForTesting();
+
   // Initialize the FFMpeg library.
   // Note: at this time, AtExitManager is already present.
   media::InitializeMediaLibraryForTesting();
 }
 
 int main(int argc, char** argv) {
   CmaTestSuite test_suite(argc, argv);
 
   return base::LaunchUnitTests(
       argc, argv, base::Bind(&CmaTestSuite::Run,
                              base::Unretained(&test_suite)));
 }