Modifications for recording whether UMA/Crash default state for iOS

chrome/common/pref_names.h

 // 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.
 
 // Constants for the names of various preferences, for easier changing.
 
 #ifndef CHROME_COMMON_PREF_NAMES_H_
 #define CHROME_COMMON_PREF_NAMES_H_
 
 #include <stddef.h>
@@ skipping 416 matching lines @@
 extern const char kGLRendererString[];
 extern const char kGLVersionString[];
 
 // Android has it's own metric / crash reporting implemented in Android
 // Java code so kMetricsReportingEnabled doesn't make sense. We use this
 // to inform crashes_ui that we have enabled crash reporting.
 #if BUILDFLAG(ANDROID_JAVA_UI)
 extern const char kCrashReportingEnabled[];
 #endif
 
-extern const char kMetricsDefaultOptIn[];
-
 extern const char kDeviceOpenNetworkConfiguration[];
 
 extern const char kProfileLastUsed[];
 extern const char kProfilesLastActive[];
 extern const char kProfilesNumCreated[];
 extern const char kProfileInfoCache[];
 extern const char kProfileCreatedByVersion[];
 
 extern const char kStabilityOtherUserCrashCount[];
 extern const char kStabilityKernelCrashCount[];
@@ skipping 347 matching lines @@
 #if defined(GOOGLE_CHROME_BUILD)
 extern const char kMediaRouterCloudServicesPrefSet[];
 extern const char kMediaRouterEnableCloudServices[];
 #endif  // defined(GOOGLE_CHROME_BUILD)
 extern const char kMediaRouterFirstRunFlowAcknowledged[];
 #endif
 
 }  // namespace prefs
 
 #endif  // CHROME_COMMON_PREF_NAMES_H_