Remove old webui History page on desktop and mobile

chrome/browser/flag_descriptions.h

 // Copyright 2017 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 CHROME_BROWSER_FLAG_DESCRIPTIONS_H_
 #define CHROME_BROWSER_FLAG_DESCRIPTIONS_H_
 
 // Includes needed for macros allowing conditional compilation of some strings.
 #include "build/build_config.h"
 #include "build/buildflag.h"
@@ skipping 15 matching lines @@
 extern const char kEnableMaterialDesignBookmarksDescription[];
 
 //  Material Design version of chrome://policy
 
 // Name for the flag to enable the material design policy page.
 extern const char kEnableMaterialDesignPolicyPageName[];
 
 // Description for the flag to enable the material design policy page.
 extern const char kEnableMaterialDesignPolicyPageDescription[];
 
-//  Material Design version of chrome://history
-
-// Name for the flag to enable the material design history page.
-extern const char kEnableMaterialDesignHistoryName[];
-
-// Description for the flag to enable the material design history page.
-extern const char kEnableMaterialDesignHistoryDescription[];
-
 //  Material Design version of chrome://settings
 
 // Name for the flag to enable the material design settings page.
 extern const char kEnableMaterialDesignSettingsName[];
 
 // Description for the flag to enable the material design settings page.
 extern const char kEnableMaterialDesignSettingsDescription[];
 
 //  Material Design version of chrome://extensions
 
@@ skipping 2887 matching lines @@
 extern const char kMediaRemotingDescription[];
 
 //  Chrome OS component updates chrome://flags strings
 
 // Name for the flag to enable Chrome OS component flash updates
 extern const char kCrosCompUpdatesName[];
 
 // Description for the flag to enable Chrome OS component flash updates
 extern const char kCrosCompUpdatesDescription[];
 
-//  Native Android History chrome://flags strings
-
-#if defined(OS_ANDROID)
-
-// Name of the flag that enables the native Android history UI.
-extern const char kNativeAndroidHistoryManager[];
-
-// Description of the flag that enables the native Android history UI.
-extern const char kNativeAndroidHistoryManagerDescription[];
-
-#endif  // defined(OS_ANDROID)
-
 //  Play Services LSD permission prompt chrome://flags strings
 
 #if defined(OS_ANDROID)
 
 // Name for the flag to enable LSD permission prompts on Android
 extern const char kLsdPermissionPromptName[];
 
 // Description for the flag to enable LSD permission prompts on Android.
 extern const char kLsdPermissionPromptDescription[];
 
@@ skipping 401 matching lines @@
 extern const char kEnableHeapProfilingDescription[];
 
 // Descriptions of the different heap profiling modes.
 extern const char kEnableHeapProfilingModePseudo[];
 extern const char kEnableHeapProfilingModeNative[];
 extern const char kEnableHeapProfilingTaskProfiler[];
 
 }  // namespace flag_descriptions
 
 #endif  // CHROME_BROWSER_FLAG_DESCRIPTIONS_H_