Noise tokens will be used as a randomized identifier for Canvas noising.
As Canvas noising is intended to be web-platform wide, we add the
following additions into both //content and //third_party/blink.
The CanvasNoiseTokenManager is a browser-sided token generator that
manages noise tokens generated once per BrowserContext instance,
meaning, each browser session/profile will generate its own noise token.
This noise token is then piped to the renderer using
RendererPreferences. On the Blink side, a frame-local global,
called CanvasNoiseToken, will store the noise token.
Bug: 392627601
Change-Id: I9292cdd8087741dc2d1cb743caeaea3050014f3d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6226586
Reviewed-by: Giovanni Ortuno Urquidi <ortuno@chromium.org>
Commit-Queue: John Kim <johnykim@google.com>
Reviewed-by: Antonio Sartori <antoniosartori@chromium.org>
Reviewed-by: Tom Van Goethem <tov@chromium.org>
Reviewed-by: Dave Tapuska <dtapuska@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1435582}
c12563dd41