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Create a tool to enable developers to annotate large amount of code with
tracing. This is an MVP which just adds tracing of the method name.

Bug: 1111787
Change-Id: I7a6fd7f51b9a3887074b1f53f005f1c0c8671a4b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2332401
Commit-Queue: Karel Král <karelkral@google.com>
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Reviewed-by: Łukasz Anforowicz <lukasza@chromium.org>
Cr-Commit-Position: refs/heads/master@{#800515}