Replace void* with ViewportDescription& in HTMLMetaElement

bbc7c4cca93dbfe2513b4288ff7ecf10878ebcf3 removed the old callback-driven
interface to the 'content' attribute parser - where "void* data" was the
callback closure/user data. Clean up to the type-safer way.

Change-Id: I2d9fffee65d7d38f226586be1b24d1c0ba9e8859
Reviewed-on: https://chromium-review.googlesource.com/1224394
Reviewed-by: Daniel Bratell <bratell@opera.com>
Commit-Queue: Fredrik Söderquist <fs@opera.com>
Cr-Commit-Position: refs/heads/master@{#591024}
2 files changed