[Chromecast] Don't override RegisterCrashKeys() on Android.

chromecast/app/android/cast_crash_reporter_client_android.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 CHROMECAST_APP_ANDROID_CAST_CRASH_REPORTER_CLIENT_ANDROID_H_
 #define CHROMECAST_APP_ANDROID_CAST_CRASH_REPORTER_CLIENT_ANDROID_H_
 
 #include <stddef.h>
 
 #include "base/compiler_specific.h"
@@ skipping 12 matching lines @@
                                    base::FilePath* crash_dir);
 
   // crash_reporter::CrashReporterClient implementation:
   void GetProductNameAndVersion(const char** product_name,
                                 const char** version) override;
   base::FilePath GetReporterLogFilename() override;
   bool GetCrashDumpLocation(base::FilePath* crash_dir) override;
   int GetAndroidMinidumpDescriptor() override;
   bool GetCollectStatsConsent() override;
   bool EnableBreakpadForProcess(const std::string& process_type) override;
-  size_t RegisterCrashKeys() override;
 
  private:
   std::string process_type_;
 
   DISALLOW_COPY_AND_ASSIGN(CastCrashReporterClientAndroid);
 };
 
 }  // namespace chromecast
 
 #endif  // CHROMECAST_APP_ANDROID_CAST_CRASH_REPORTER_CLIENT_ANDROID_H_