Give g_controllers more distinct names in content tracing

The two different g_controllers clashed when I tried a
jumbo build in content/browser. This renames them with more
distinct names.

Bug: 746953
Change-Id: I06daeb3e2f129c093dadbe88a1bd972bfcf436b3
Reviewed-on: https://chromium-review.googlesource.com/716677
Reviewed-by: Primiano Tucci <[email protected]>
Commit-Queue: Daniel Bratell <[email protected]>
Cr-Commit-Position: refs/heads/master@{#508437}
2 files changed