Make MetricsService save compressed logs to local state.

chrome/browser/metrics/metrics_service_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.
 
 #include "components/metrics/metrics_service.h"
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/prefs/testing_pref_service.h"
 #include "base/threading/platform_thread.h"
 #include "chrome/browser/google/google_util.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/test/base/scoped_testing_local_state.h"
 #include "chrome/test/base/testing_browser_process.h"
+#include "components/metrics/compression_utils.h"
 #include "components/metrics/metrics_log.h"
 #include "components/metrics/metrics_service_observer.h"
 #include "components/metrics/metrics_state_manager.h"
 #include "components/metrics/test_metrics_service_client.h"
 #include "components/variations/metrics_util.h"
 #include "content/public/test/test_browser_thread_bundle.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 #if defined(OS_CHROMEOS)
 #include "chromeos/login/login_state.h"
@@ skipping 176 matching lines @@
 
   // The initial stability log should be generated and persisted in unsent logs.
   MetricsLogManager* log_manager = service.log_manager();
   EXPECT_TRUE(log_manager->has_unsent_logs());
   EXPECT_FALSE(log_manager->has_staged_log());
 
   // Stage the log and retrieve it.
   log_manager->StageNextLogForUpload();
   EXPECT_TRUE(log_manager->has_staged_log());
 
+  std::string uncompressed_log;
+  EXPECT_TRUE(metrics::GzipUncompress(log_manager->staged_log(),
+                                      &uncompressed_log));
+
   metrics::ChromeUserMetricsExtension uma_log;
-  EXPECT_TRUE(uma_log.ParseFromString(log_manager->staged_log()));
+  EXPECT_TRUE(uma_log.ParseFromString(uncompressed_log));
 
   EXPECT_TRUE(uma_log.has_client_id());
   EXPECT_TRUE(uma_log.has_session_id());
   EXPECT_TRUE(uma_log.has_system_profile());
   EXPECT_EQ(0, uma_log.user_action_event_size());
   EXPECT_EQ(0, uma_log.omnibox_event_size());
   EXPECT_EQ(0, uma_log.histogram_event_size());
   EXPECT_EQ(0, uma_log.profiler_event_size());
   EXPECT_EQ(0, uma_log.perf_data_size());
 
@@ skipping 91 matching lines @@
 
   service.RemoveObserver(&observer1);
 
   service.OpenNewLog();
   EXPECT_EQ(2, observer1.observed());
   EXPECT_EQ(2, observer2.observed());
   service.log_manager_.FinishCurrentLog();
 
   service.RemoveObserver(&observer2);
 }