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Both WebView's and Chrome's cache clearing APIs do the following:
1) Clear the GL shader cache, which corresponds to DATA_TYPE_CACHE in
the language of browser_data_remover.h.
2) Clear the Blink cache of the renderers.

This CL implements the second part.

Change-Id: I2c85de5ca6d286c22954c56a838e4b02cd57b5ee
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1893251Reviewed-by: Scott Violet <sky@chromium.org>
Reviewed-by: Bo <boliu@chromium.org>
Commit-Queue: Pavel Shmakov <pshmakov@chromium.org>
Cr-Commit-Position: refs/heads/master@{#712648}