Roll src/third_party/trace-viewer e2b5374:473c6c4

Roll src/third_party/trace-viewer e2b5374:473c6c4

This patch pulls in recent Trace Viewer changes, almost half of which
are UI fixes and changes for memory-infra.

Summary of changes available at (79 patches):
https://chromium.googlesource.com/external/trace-viewer/+log/e2b5374..473c6c4

Size increase for resources.pak:
51889 bytes (17350965 -> 17402854)

BUG=458295
Committed: https://crrev.com/b4a9e86d1fb67f1340eee95a98be2a7f285d8097
Cr-Commit-Position: refs/heads/master@{#330756}

[petrcermak, 2015-05-20 15:50:36]

petrcermak@chromium.org changed reviewers:
+ primiano@chromium.org

[petrcermak, 2015-05-20 15:50:37]

Hi, please review this patch.

Thanks,
Petr

[Primiano Tucci (use gerrit), 2015-05-20 15:52:43]

LGTM, Let's Rock, let's Roll!

[petrcermak, 2015-05-20 15:53:06]

The CQ bit was checked by petrcermak@chromium.org

[commit-bot: I haz the power, 2015-05-20 15:53:35]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1146143002/1

[commit-bot: I haz the power, 2015-05-20 17:05:41]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-05-20 17:06:35]

Patchset 1 (id:??) landed as
https://crrev.com/b4a9e86d1fb67f1340eee95a98be2a7f285d8097
Cr-Commit-Position: refs/heads/master@{#330756}