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Per the mocks, move the throbber and the info icon to the left of the view.
Also factor out constants and throbber creating code into a helper file.
Screencap: https://drive.google.com/open?id=1UF1uamxoR0oG-3aEHwdJkoHU_7pJW_CB

Bug: 879630
Change-Id: I42ee54d063df0f9af74cad10a4a21a9a8f78a869
Reviewed-on: https://chromium-review.googlesource.com/1199945
Commit-Queue: Takumi Fujimoto <takumif@chromium.org>
Reviewed-by: Derek Cheng <imcheng@chromium.org>
Cr-Commit-Position: refs/heads/master@{#589206}