Ensure the app list search result progress bar is set in SetResult()

Ensure the app list search result progress bar is set in SetResult()

SearchResultView::SetResult() was missing a call to
OnPercentDownloadedChanged().

This CL adds one.

BUG=402859
Committed: https://crrev.com/a48fbeb71d7b4e66a5fafecf2b81ec6d5f97e1c5
Cr-Commit-Position: refs/heads/master@{#294790}

[tapted, 2014-09-15 04:46:14]

tapted@chromium.org changed reviewers:
+ calamity@chromium.org

[calamity, 2014-09-15 06:50:26]

lgtm

[tapted, 2014-09-15 07:03:41]

The CQ bit was checked by tapted@chromium.org

[commit-bot: I haz the power, 2014-09-15 07:03:56]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patchset/568383002/1

[commit-bot: I haz the power, 2014-09-15 07:45:55]

Committed patchset #1 (id:1) as 0620e511e6bdb50ea8252b900997993dfb221144

[commit-bot: I haz the power, 2014-09-15 07:48:36]

Patchset 1 (id:??) landed as
https://crrev.com/a48fbeb71d7b4e66a5fafecf2b81ec6d5f97e1c5
Cr-Commit-Position: refs/heads/master@{#294790}