Factor ChromeOS specific code out of MetricsLog.

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 "chrome/browser/metrics/metrics_service.h"
 
 #include <ctype.h>
 #include <string>
 
 #include "base/command_line.h"
@@ skipping 16 matching lines @@
   virtual ~TestMetricsService() {}
 
   MetricsLogManager* log_manager() {
     return &log_manager_;
   }
 
  private:
   DISALLOW_COPY_AND_ASSIGN(TestMetricsService);
 };
 
+#if defined(OS_CHROMEOS)
+class TestMetricsLogChromeOS : public MetricsLogChromeOS {
+ public:
+  explicit TestMetricsLogChromeOS(
+      metrics::SystemProfileProto* system_profile)
+      : MetricsLogChromeOS(system_profile) {
+  }
+
+ protected:
+  // Don't touch bluetooth information, as it won't be correctly initialized.
+  virtual void WriteBluetoothProto(
+      metrics::SystemProfileProto::Hardware* hardware) OVERRIDE {
+  }
+};
+#endif  // OS_CHROMEOS
+
 class TestMetricsLog : public MetricsLog {
  public:
   TestMetricsLog(const std::string& client_id, int session_id)
-      : MetricsLog(client_id, session_id) {}
+      : MetricsLog(client_id, session_id) {
+#if defined(OS_CHROMEOS)
+    metrics_log_chromeos_.reset(new TestMetricsLogChromeOS(
+        MetricsLog::uma_proto()->mutable_system_profile()));
+#endif  // OS_CHROMEOS
+  }
   virtual ~TestMetricsLog() {}
 
  private:
   virtual gfx::Size GetScreenSize() const OVERRIDE {
     return gfx::Size(1024, 768);
   }
 
   virtual float GetScreenDeviceScaleFactor() const OVERRIDE {
     return 1.0f;
   }
 
   virtual int GetScreenCount() const OVERRIDE {
     return 1;
   }
 
-  virtual void WriteBluetoothProto(
-      metrics::SystemProfileProto::Hardware* hardware) OVERRIDE {
-  }
-
   DISALLOW_COPY_AND_ASSIGN(TestMetricsLog);
 };
 
 class MetricsServiceTest : public testing::Test {
  public:
   MetricsServiceTest()
       : testing_local_state_(TestingBrowserProcess::GetGlobal()) {
   }
 
   virtual ~MetricsServiceTest() {
@@ skipping 222 matching lines @@
   service.log_manager_.FinishCurrentLog();
   service.log_manager_.BeginLoggingWithLog(new MetricsLog("clientID", 1),
                                            MetricsLog::ONGOING_LOG);
   service.GetCurrentSyntheticFieldTrials(&synthetic_trials);
   EXPECT_EQ(3U, synthetic_trials.size());
   EXPECT_TRUE(HasSyntheticTrial(synthetic_trials, "TestTrial1", "Group2"));
   EXPECT_TRUE(HasSyntheticTrial(synthetic_trials, "TestTrial2", "Group2"));
   EXPECT_TRUE(HasSyntheticTrial(synthetic_trials, "TestTrial3", "Group3"));
   service.log_manager_.FinishCurrentLog();
 }