[Android] Trace TTS initialization

[Android] Trace TTS initialization

TTS initialiation can take around ~150ms to initialize on Android. Trace
this initialization to make it clear if the task is blocking critical
updates on the browser UI thread.

BUG=406597
Committed: https://crrev.com/d21a7776f0137e2016946e572f76cd556828f9b7
Cr-Commit-Position: refs/heads/master@{#294869}

[jdduke (slow), 2014-09-10 19:29:01]

jdduke@chromium.org changed reviewers:
+ dtrainor@chromium.org

[jdduke (slow), 2014-09-10 19:29:02]

dtrainor@: PTAL, thanks.

[David Trainor- moved to gerrit, 2014-09-15 17:39:56]

lgtm

[jdduke (slow), 2014-09-15 17:41:15]

The CQ bit was checked by jdduke@chromium.org

[commit-bot: I haz the power, 2014-09-15 18:02:22]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patchset/558323002/1

[commit-bot: I haz the power, 2014-09-15 19:40:01]

Committed patchset #1 (id:1) as 6c02d33b7db432ca9087e7110a154244aad1fde4

[commit-bot: I haz the power, 2014-09-15 19:46:20]

Patchset 1 (id:??) landed as
https://crrev.com/d21a7776f0137e2016946e572f76cd556828f9b7
Cr-Commit-Position: refs/heads/master@{#294869}