{
    "EnhancedBookmarks": [
        {
            "group_name": "EnableEnhancedBookmarks",
            "params": {
                "id": "Fake_id_to_trigger_experiment_code"
            }
        },
        {
            "group_name": "EnableEnhancedBookmarksGrid",
            "params": {
                "DefaultViewMode": "Grid",
                "id": "Fake_id_to_trigger_experiment_code"
            }
        },
        {
            "group_name": "EnableEnhancedBookmarksList",
            "params": {
                "DefaultViewMode": "List",
                "id": "Fake_id_to_trigger_experiment_code"
            }
        }
    ],
    "CustomTabs": [
        {
            "group_name": "Enabled"
        },
        {
            "group_name": "Disabled"
        }
    ],
    "LimitSyncPassphrasePrompt": [
        {
            "group_name": "Enabled"
        }
    ],
    "ReaderModeUIFeedback": [
        {
            "group_name": "Show"
        },
        {
            "group_name": "DoNotShow"
        }
    ]
}

{
    "EnhancedBookmarks": [
        {
            "group_name": "EnableEnhancedBookmarks",
            "params": {
                "id": "Fake_id_to_trigger_experiment_code"
            }
        },
        {
            "group_name": "EnableEnhancedBookmarksGrid",
            "params": {
                "DefaultViewMode": "Grid",
                "id": "Fake_id_to_trigger_experiment_code"
            }
        },
        {
            "group_name": "EnableEnhancedBookmarksList",
            "params": {
                "DefaultViewMode": "List",
                "id": "Fake_id_to_trigger_experiment_code"
            }
        }
    ],
    "CustomTabs": [
        {
            "group_name": "Enabled"
        },
        {
            "group_name": "DisablePrerender"
        },
        {
            "group_name": "Disabled"
        }
    ],
    "LimitSyncPassphrasePrompt": [
        {
            "group_name": "Enabled"
        }
    ],
    "ReaderModeUIFeedback": [
        {
            "group_name": "Show"
        },
        {
            "group_name": "DoNotShow"
        }
    ]
}

Update config to add a new state to custom tab experiment
Update config to add a new state to custom tab experiment

This add another state to disable prerendering in custom tabs
while keeping the rest of the feature enabled adding another
level of control to the kill switch.

BUG=493656

Review URL: https://codereview.chromium.org/1203203004

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#336184}
