Using an ID that can be controlled by a compromised renderer which allows any frame to overwrite the page_state of any other frame in the s…

Using an ID that can be controlled by a compromised renderer which allows any frame to overwrite the page_state of any other frame in the same process in Navigation in Google Chrome on Chrome OS prior to 62.0.3202.74 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page.