Modify appearance of pdf viewer

Want to modify pdf viewer. There is icon rotate-counterclockwise. Want either to replace the icon with rotate-clockwise or remove the icon.

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Tried mouse right-click Inspect, see that icon is named as iron-icon. Then searched in Brave files for iron-icon. Found that exists in chrome.dll. Installed reshacker_setup.exe, opened chrome.dll. But i can not find place where iron-icon is located.
Please advice how to change Brave pdf viewer appearance, or how to modify chrome.dll (how to find place where iron-icon is located).

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