Remove DEFINE_WEB_CONTENTS_USER_DATA_KEY in //ui.

It is no longer necessary to invoke the DEFINE_WEB_CONTENTS_USER_DATA_KEY
macro to define the global variable from which the key of a
WebContentsUserData is derived. The key is now derived from a static
local variable in WebContentsUserData::UserDataKey().
See https://chromium-review.googlesource.com/c/chromium/src/+/1093015

This CL was uploaded by git cl split.

R=sadrul@chromium.org

Bug: 589840
Change-Id: I26d9d7478b46c88bde21ec9ee095cebb26c0e520
Reviewed-on: https://chromium-review.googlesource.com/1150288
Commit-Queue: François Doray <fdoray@chromium.org>
Reviewed-by: Sadrul Chowdhury <sadrul@chromium.org>
Cr-Commit-Position: refs/heads/master@{#578297}
1 file changed