Android: Start VIEW_INTENT navigations ASAP

Usually ChromeTabbedActivity.initializeState performs the initial
navigation, however for view intents we know the URL and can start as
soon as the profile is loaded (can be several hundred ms earlier on
low end devices). In theory it might be possible to do this for main
intents too but getting hold of the URL is beyond the scope of this
patch.

This change is guarded behind the kPrioritizeBootstrapTasks feature.

BUG 863341, 835323

Change-Id: If296fde03b381178ed6feeba70bc50b786eac1e0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1663146
Reviewed-by: Alexander Timin <[email protected]>
Reviewed-by: Pavel Shmakov <[email protected]>
Reviewed-by: Yaron Friedman <[email protected]>
Reviewed-by: Ted Choc <[email protected]>
Reviewed-by: Min Qin <[email protected]>
Reviewed-by: Sami Kyöstilä <[email protected]>
Reviewed-by: Mohamed Heikal <[email protected]>
Commit-Queue: Alex Clarke <[email protected]>
Cr-Commit-Position: refs/heads/master@{#703307}
31 files changed