Remove plumbing for inert-visual-viewport flag

chrome/browser/about_flags.cc

 // 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.
 
 #include "chrome/browser/about_flags.h"
 
 #include <iterator>
 #include <map>
 #include <set>
 #include <utility>
@@ skipping 1564 matching lines @@
      IDS_FLAGS_ENABLE_NEW_APP_LIST_MIXER_DESCRIPTION,
      kOsWin | kOsLinux | kOsCrOS | kOsMac,
      ENABLE_DISABLE_VALUE_TYPE(app_list::switches::kEnableNewAppListMixer,
                                app_list::switches::kDisableNewAppListMixer)},
 #endif
     {"disable-threaded-scrolling",
      IDS_FLAGS_DISABLE_THREADED_SCROLLING_NAME,
      IDS_FLAGS_DISABLE_THREADED_SCROLLING_DESCRIPTION,
      kOsWin | kOsLinux | kOsCrOS | kOsAndroid | kOsMac,
      SINGLE_VALUE_TYPE(switches::kDisableThreadedScrolling)},
-    {"inert-visual-viewport",
-     IDS_FLAGS_INERT_VISUAL_VIEWPORT_NAME,
-     IDS_FLAGS_INERT_VISUAL_VIEWPORT_DESCRIPTION,
-     kOsAll,
-     SINGLE_VALUE_TYPE(switches::kInertVisualViewport)},
     {"enable-settings-window",
      IDS_FLAGS_ENABLE_SETTINGS_WINDOW_NAME,
      IDS_FLAGS_ENABLE_SETTINGS_WINDOW_DESCRIPTION,
      kOsDesktop,
      ENABLE_DISABLE_VALUE_TYPE(switches::kEnableSettingsWindow,
                                switches::kDisableSettingsWindow)},
 #if defined(OS_MACOSX)
     {"enable-save-password-bubble",
      IDS_FLAGS_ENABLE_SAVE_PASSWORD_BUBBLE_NAME,
      IDS_FLAGS_ENABLE_SAVE_PASSWORD_BUBBLE_DESCRIPTION,
@@ skipping 1375 matching lines @@
   FlagsState::GetInstance()->SetFeatureEntries(entries, count);
 }
 
 const FeatureEntry* GetFeatureEntries(size_t* count) {
   return FlagsState::GetInstance()->GetFeatureEntries(count);
 }
 
 }  // namespace testing
 
 }  // namespace about_flags