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

components/metrics/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_METRICS_SERVICE_CLIENT_H_
 #define COMPONENTS_METRICS_METRICS_SERVICE_CLIENT_H_
 
 #include <stdint.h>
 #include <string>
 
@@ skipping 11 matching lines @@
 // An abstraction of operations that depend on the embedder's (e.g. Chrome)
 // environment.
 class MetricsServiceClient {
  public:
   virtual ~MetricsServiceClient() {}
 
   // Registers the client id with other services (e.g. crash reporting), called
   // when metrics recording gets enabled.
   virtual void SetMetricsClientId(const std::string& client_id) = 0;
 
+  // Notifies the client that recording is disabled, so that other services
+  // (such as crash reporting) can clear any association with metrics.
+  virtual void OnRecordingDisabled() = 0;
+
   // Whether there's an "off the record" (aka "Incognito") session active.
   virtual bool IsOffTheRecordSessionActive() = 0;
 
   // Returns the product value to use in uploaded reports, which will be used to
   // set the ChromeUserMetricsExtension.product field. See comments on that
   // field on why it's an int32 rather than an enum.
   virtual int32_t GetProduct() = 0;
 
   // Returns the current application locale (e.g. "en-US").
   virtual std::string GetApplicationLocale() = 0;
@@ skipping 29 matching lines @@
   virtual base::TimeDelta GetStandardUploadInterval() = 0;
 
   // Returns the name of a key under HKEY_CURRENT_USER that can be used to store
   // backups of metrics data. Unused except on Windows.
   virtual base::string16 GetRegistryBackupKey();
 };
 
 }  // namespace metrics
 
 #endif  // COMPONENTS_METRICS_METRICS_SERVICE_CLIENT_H_