Alternate NTP: Don't hide bookmark bar on instant

Currently when typing in the omnibox the instant search results are shown next to omnibox by hiding the bookmark bar.

This causes the web contents to jump up by 26 pixels.

This CL works around this by changing the zorder such that the bookmark bar is under the web contents. With this approach there's no need to hide the bookmark bar and the web contents doesn't jump when typing.

Screen recording:
New: https://docs.google.com/file/d/0B0Odde3V7EhWcnBBRVBxUXdnN2c/edit
New Infobar: https://docs.google.com/file/d/0B0Odde3V7EhWOG4wVWZ6WGp0aDQ/edit
Old: https://docs.google.com/file/d/0B0Odde3V7EhWOFYzeTlVbzRXX2s/edit

Sample build:
  https://docs.google.com/file/d/0B0Odde3V7EhWLXdnYVpHa0xEcFk/edit

BUG=170835
TBR=thakis@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=178367

Review URL: https://codereview.chromium.org/11876036

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@178392 0039d316-1c4b-4281-b951-d872f2087c98
23 files changed