Set a "metrics_client_id" crash key instead of "guid" on Mac OS X

components/metrics/test_metrics_service_client.h

 // 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.
 
 #ifndef COMPONENTS_METRICS_TEST_METRICS_SERVICE_CLIENT_H_
 #define COMPONENTS_METRICS_TEST_METRICS_SERVICE_CLIENT_H_
 
 #include <string>
 
 #include "components/metrics/metrics_service_client.h"
 
 namespace metrics {
 
 // A simple concrete implementation of the MetricsServiceClient interface, for
 // use in tests.
 class TestMetricsServiceClient : public MetricsServiceClient {
  public:
   static const char kBrandForTesting[];
 
   TestMetricsServiceClient();
   ~TestMetricsServiceClient() override;
 
   // MetricsServiceClient:
   void SetMetricsClientId(const std::string& client_id) override;
+  void OnRecordingDisabled() override;
   bool IsOffTheRecordSessionActive() override;
   int32_t GetProduct() override;
   std::string GetApplicationLocale() override;
   bool GetBrand(std::string* brand_code) override;
   SystemProfileProto::Channel GetChannel() override;
   std::string GetVersionString() override;
   void OnLogUploadComplete() override;
   void StartGatheringMetrics(const base::Closure& done_callback) override;
   void CollectFinalMetrics(const base::Closure& done_callback) override;
   scoped_ptr<MetricsLogUploader> CreateUploader(
       const base::Callback<void(int)>& on_upload_complete) override;
   base::TimeDelta GetStandardUploadInterval() override;
 
   const std::string& get_client_id() const { return client_id_; }
   void set_version_string(const std::string& str) { version_string_ = str; }
   void set_product(int32_t product) { product_ = product; }
 
  private:
   std::string client_id_;
   std::string version_string_;
   int32_t product_;
 
   DISALLOW_COPY_AND_ASSIGN(TestMetricsServiceClient);
 };
 
 }  // namespace metrics
 
 #endif  // COMPONENTS_METRICS_TEST_METRICS_SERVICE_CLIENT_H_