Adding flags and finch trial for the removal of All Bookmarks view.

ios/chrome/browser/about_flags.mm

 // Copyright 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.
 
 // Implementation of about_flags for iOS that sets flags based on experimental
 // settings.
 
 #include "ios/chrome/browser/about_flags.h"
 
 #include <stddef.h>
@@ skipping 82 matching lines @@
   // Populate command line flag for the SnapshotLRUCache experiment from the
   // configuration plist.
   NSString* enableLRUSnapshotCache =
       [defaults stringForKey:@"SnapshotLRUCache"];
   if ([enableLRUSnapshotCache isEqualToString:@"Enabled"]) {
     command_line->AppendSwitch(switches::kEnableLRUSnapshotCache);
   } else if ([enableLRUSnapshotCache isEqualToString:@"Disabled"]) {
     command_line->AppendSwitch(switches::kDisableLRUSnapshotCache);
   }
 
+  // Populate command line flag for the AllBookmarks from the
+  // configuration plist.
+  NSString* enableAllBookmarks = [defaults stringForKey:@"AllBookmarks"];
+  if ([enableAllBookmarks isEqualToString:@"Enabled"]) {
+    command_line->AppendSwitch(switches::kEnableAllBookmarksView);
+  } else if ([enableAllBookmarks isEqualToString:@"Disabled"]) {
+    command_line->AppendSwitch(switches::kDisableAllBookmarksView);
+  }
+
   // Populate command line flag for the NTP favicons experiment from the
   // configuration plist.
   NSString* enableNTPFavicons = [defaults stringForKey:@"EnableNTPFavicons"];
   if ([enableNTPFavicons isEqualToString:@"Enabled"]) {
     command_line->AppendSwitch(switches::kEnableNTPFavicons);
   } else if ([enableNTPFavicons isEqualToString:@"Disabled"]) {
     command_line->AppendSwitch(switches::kDisableNTPFavicons);
   }
 
   // Populate command line flags from PasswordGenerationEnabled.
@@ skipping 171 matching lines @@
 }
 
 namespace testing {
 
 const flags_ui::FeatureEntry* GetFeatureEntries(size_t* count) {
   *count = arraysize(kFeatureEntries);
   return kFeatureEntries;
 }
 
 }  // namespace testing